Pick the one that is designed to work off axis as well as the ability to reproduce accurately at good volumes.
Here's a list in no particular order for custom builders and users of higher performance drivers:
Ascent Acoustics
Philharmonic Audio
Salk
Selah Audio
Funk Audio
I might be a bit biased since I'm getting something built by Funk and know about the drivers capabilities used by other manufacturers.
But here it goes...on Why I picked Funk Audio over the other manufacturers.
1. The guy builds his own drivers
2. Performance equal to or greater than Raal tweeters
3. High efficiency
4. Integration without needing expensive active crossovers and powerful DSPs required for my line array.
5. I get videos, it's like watching how it's make for your own stuff
6. Cabinets are beautiful
7. Very good communication. I do call him and annoy him, but was always at a professional level
8. Some designs that are simply not available.
9. Comes up with new drivers every once and awhile. R&D that is not held back by Marketing
10. Their site is active with updates on what they are working on.
If I had 10K
I would by a 8.2P Demo and a 18.0SE, would cost you 4850 + 2850 = 7700(Includes shipping to NA)
You would get plenty of dynamics and a tweeter that can keep up with the mains. I would consider this a perfect example of a beautifully integrated MTM.
The reason why I recommend the demo? I saw them a month ago, and in great condition along with 10 other people at the AVS GTG in Vancouver this year. Like new.
You would get seriously accurate output & accuracy that out does LMS Ultra that is noted by Docks, another forum member that owns both versions built by Nathan with pictures. See the below link:
With this you achieve performance levels you would compete against many systems well above what you paid for. The way it responds and present you with the performance is very different from what you get from B&W(800 series+) if you have heard that one. Music that is full of life and draws you in. Highly dynamic, distortion is non-existent.
If I'm not recommending those Funk Audios, Give Selah Audio a shot with their scanspeak and raal combinations. Or his tempestas which is an accuton build with crossovers well below their ringing point. They are properly crossed over and seems like a nice design as well. Integration with seas drivers are also possible with the raal tweeter. Seas are good drivers are recommend them and has been know for their accuracy. But personally with their large line along with accuton and their high price, I haven't listened to their entire line up. They are, however, drivers designed right.
Philharmonic Speakers are larger and may not be appealing to everyone, but is also a builder that place charts and information that is useful. Also uses Raal tweeter that are crossed with the BG Neos below their problematic areas.
Salk also offers a few appealing line ups with nice looks, but just didn't seem interesting to me. Their MTMs and Higher line is nice but the pricing...
If your place is smaller and not much is required even the Funk Audio 6.1P maybe able to do it. At 2200 and that sub you save a lot for maybe a vacation a car or lots of beer popcorn and possibly some extra blurays to watch you movies.
I really hope this helps you on your adventure. I've been though this long road already...You can see the story on the below link.