Trey,
You da man. Sounds like a great setup. I can't wait to see how your HTPC setup works. I've considered building / converting a computer to serve the function of CD / DVD player / DVR / HD tuner / gaming rig / internet terminal but could never find a good way to get the 5.1 / 7.1 sound out and still have processing modes intact. I'd like to see how the connections work.
Good advice on the Ascends return shipping for demo purposes- in fact when the time comes I'm planning on ordering a pair of the Axiom M3s and Aperion 522s to do some side by side with the CBM-170s, then the winner gets the rest of the order while the two losers take a return trip with Mr. UPS. Its tempting just to pull the trigger on the front pair right now, despite the fact the new room is not done!
By the way, Ascend offers a really neat bundle purchase deal if you order the remainder within 45 days. That lets you audition and then pull the trigger on the rest.
~Josh