Thanks a ton for your thoughtful reponse! Reply in green.
I'm feeling very validated on my choice of speakers right now. 
Thanks for helping debunk the idea that near-field can't be used for a bigger application. I have them set up in my living room and think they sound amazing. Also, I rarely get close to challenging their SPL levels so I don't need anything bigger like the Twin6's
I'm feeling very confident that I should just keep my Solo's and invest in some bass.
Yeah, I think you'll be very happy with how the subs will complement your Focals! Understand that subs take an investment of time to setup properly and your first step (unless you intend to start taking measurements) is to do the sub crawl:
Subwoofer Placement: An easy guide for placement of your home theater subwoofer. Crawl for bass to find the optimal location and achieve the best sound.
www.audioholics.com
I have considered getting a single SB-3000 from SVS because I can pick one up for $999, but my concern is that having a single sub won't allow for a smooth response. Can you check out my living room pictures below and tell me what you would do with that room?
Dual Hsu ULS-15's should do a great job in there! I would experiment with moving the speakers a little farther from the TV - the theoretical optimal setup has the distance between each speaker and you and between the speakers all form an equilateral triangle. This is by no means critical, but looking at the photo (which can be deceiving), it looks like moving both speakers about a foot outward from the TV would get it closer.
Last, play with moving the speakers into the room and away from the back wall. You might even try putting 3 feet between them and the wall. I know this is probably not practicable, but see how much difference you hear then figure out how much you can "cheat" the speakers into the room. It helps that the port fires forward, but the theory as I understand it is that if the reflective surface is to close to the speaker, the reflection blurs the resolution of the sound. so if you are a foot off the wall the delay between the reflection and the signal is the time it take a sound wave to travel two feet. At three feet off of the wall it has to travel 6 feet. My understanding is that our brains do a pretty good job of recognizing and isolating the signal from the reflection if the delay is long enough! Depending on you experience with this, you might actually want to move them out for those occasional special situations where you want the best sound possible!
Music is most important because I listen to music more than I watch movies, but it would be nice to get the full thump-in-the-chest movie experience from time to time. To do that, do I have to get a ported sub? Or would 2 sealed subs or even one big sealed sup like the Rhythmik do the trick? If I went Hsu, maybe something like this?
http://www.hsuresearch.com/products/vtf-15hmk2Dual.html.
I'm not sure the Rythmik will put out much more than the Hsu. Compared to how Audyssey sets up my system, I tend to run HT 6 dB hot, and music, -2dB lighter. If you have the experience typical of most people(don't have friends with kick-ass subs), a good set of Dual 15" sealed subs will blow you away in a room your size. It is relative to your expectations/experience. You will get the chest thump, but the ported can shake your sofa harder than the sealed (which will still shake the sofa). But if size and cost are okay with 15" ported subs, go for it! The Hsu's are good because of the adjustments and they also allow you to plug the ports to vary the sound. Just check the size.
I am planning on buying a Marantz SR8012 AV Receiver. Would that work well to integrate the sub(s) with my Focals?
Perfect, IMHO, that is the optimum system (once you add the $20 Audyssey app to your tablet/phone) for integrating your subs - but don't discount the need to do the sub crawl first (think of the sub crawl as helping Audyssey help you).
2) Martin Logan Vista (electrostatic) -
https://www.bestbuy.com/site/martinlogan-electromotion-esl-8-floor-speaker-each-black/2074269.p?skuId=2074269&ref=212&loc=1&extStoreId=527&ref=212&loc=BM01&gclid=CjwKCAiA4Y7yBRB8EiwADV1haYSh077_NammBAJtv7sczHa5BwnXKtLBqcTLN7UcNM0BlDigRImQzBoCvaoQAvD_BwE&gclsrc=aw.ds
Any ML electrostat will present the basic character of e'stats, as long as it has the see through panels it is the right stuff. I'd say since you are checking them out for the fun of it (at least now) listen to the most expensive e'stat your store has set up!
3) Canton Vento speakers with ceramic tweeter -
I have heard great things about these, but yeah, it would be a deal breaker if they aren't great for choral music. What music do you find them to be really good at?
For the price, I think they are really good at everything, but compared to the Focals or BMR, my current belief (and this is subjective evaluation) is that an aggressive wave guide better presents a sound such as a trumpet that is directed more forward with less reflections and not so good with a violin which radiates sound in all directions. Rock/electric music doesn't have such a specific sound signature (to me) as acoustic instruments, so I would not credit either design as being better with most guitar, etc., but they are different!
4) Philharmonic Audio BMR
I just looked these up and it looks like @shadyJ gave them a very favorable review. I do like ribbon tweeters because of their detail. These speakers may have to go on my wishlist for next year.
If you want, but my thought is that if you were to swap these speakers, you would not realize a clear enough difference as to notice an improvement! If you set them up side by side, then you would notice the difference, but I find switching between speakers like this you will detect differences but have a difficult time declaring one better than the other. The waveguide (Canton) and electrostatics (Martin Logan) have unique aspects that dominate the experience, but there is no such different "philosophy" between the Focal and BMR, and both have high quality drivers with great detail!
