New HT System
Nice list of gear for the new system.
You might not be happy with the Paradigm sub in a large room. Check out the options from SVS, HSU, and AV123 in your budget and size requirments.
It looks like your have a decent amount to spend on speakers. Try to audition a few other options at the local dealer. Some ID also offering high value systems with floorstanders are RBH/EMP, AV123(X-series, ELT, and Rockets), Aperion, and Axiom. If you are interested in one of these options you might be able to find a nearby owner for a demo.
Also, FYI,
I used Pheonix Gold VCs for my whole house system and they worked great and only cost about $25 each.