Room size is 19x20x8. I'd like to stay around this total price range for this setup, but my budget is somewhat flexible (probably +/- $200).
I can't say I know very much about your choice of speakers but here are some general thoughts to keep in mind when putting together a system.
1. Towers over bookshelves for L and R channels. That's not to say that there are not good bookshelves out there because there are plenty of them. But over all if there is a set of towers in the same line as the bookshelves I would normally look seriously at the towers if your space allows (but there exceptions to every rule).
2. Get the best center channel you can that is timbre matched to the L and R channels. Those three channels together account for most of the sound in the movies you watch.
3. Get the best AVR you can afford with what you have left after you find the best speakers you can afford (edited). This will future proof you (or at the very least it will usually buy you a little more time before upgraditis infects you).
4. Get the best subwoofer for your money. In my opinion this means looking at the id companies (SVS, PSA, HSU, Rythmik, and Outlaw). They are by far the best bang for your buck.
You have 3000+ cu ft in your rec room, that's a good size space to pressurize for adequate bass. I would suggest looking at the offerings of the companies listed above. Especially since people are pointing you to going dual subs due to the space you have. You might find a single sub from PSA, HSU, Rythmik or SVS would provide more bass than dual BIC subs. Don't hesitate to email any of those ID companies and ask for help. They have great customer service.
That being said, dual subs tend to be better than a single sub in any room for smoothing out the bass across the listening positions. So if possible, I suggest going dual subs from one of these id companies. However, there is a limit to every budget so you have to weigh every choice against your budget. That's the challenging part of putting together any system. Good luck and have fun with it.
Edited by Hopinater - 11/9/13 at 7:21pm