@Redjay , a picture says a thousand words, and a diagram with dimensions even more! We'd need locations for windows, doorways, ceiling height, is it a drop ceiling?, seating location, etc. Is it going to be a single use for home theater and 2 channel listening, or a multi-use room for ? Is the seating Rows or couches, or sectional, or 4 Leather Lazyboy Recliners? (Don't laugh - I had them for over a decade and they were great!)
You'll get lots of support here for multi-subs, and some my push for a little more Oomph than those (
@Pogre I'm thinking of you
). I doubt anyone here will try to push you on your budget, as you've got a very healthy one. Personally, I'm not a full blown theater guy with a projector, as I'm more into multi-use rooms and big TVs with a brighter ambience. But lots of the gents are on that page so they'll be helpful.
We almost all struggle with the WAF balance point and know the Power of Veto! If you make a great sounding Home Theater Setup - the resulting 2 channel playback will also sound great.