With all due respect, I greatly appreciate the feedback......
With that being said, I have done a lot of research/testing on the car audio side and found that I like the big manufacturers for a reason. I have used CDT, ED, Alpine, MB Quart, Diamond Audio, etc., but found the Alpine stuff to be the most reliable and readily available.
Part of the reason I would like to go with Infinity or JBL is that I can hear them locally and then look for the best deal online.
I had an Elemental Designs 13Ov.2 in a 1.5 cu ft enclosure fed off of 300 rms and it would absolutely shred (I mean it would vibrate the hair on your scalp in my X5). I would strongly consider an ED HT sub for that reason, and the fact that they are 3 hours from my home, but I want something that has a professional finished look.
Enter the Infinity Primus; I can get a smoking deal, with good sound, and audition them locally before I purchase. Primus owners: are you feeling me? Is your sound adequate for your HT setup?