We get these all the time, no responce from the op in a few days, probably going to best buy, lol...
I hear it often, people ask me, "hey what can I put in my room for a sound system" and then when you ask what they want to spend, they say "what ever no budget, just good sound" then I say, "well for a nice 2.2 music rig, figure $700 for an rr2150, $200 for a parasound zcd, $1500 for a pair of subs, $1500 for a pair of bookshelfs, then a couple hundred for stands and cables, gets you rite over $4000" they look at you like you have 3 heads and never bring it up again... Now if they just asked "what can I get for around $500 I would say a nice set of hvl1's and a refurbed stereo receiver, listen and enjoy...
For the op if he is serious, we should have a budget because you can buy subs for $50K, if money were no object for me and I wanted subs for a room, I would have Funk audio build me 4 18" passive subs {with dual 18's in each}, something 4ohm sealed that can handle a couple thousand watts... And I would power them with 4- XPR1's that would be 1750 watts each for a total of 7000 watts {sure class d pro amps would be cheaper, but in my experience they just dont last like a a/b and they have no triggers, and when money is no object??? why not}...
So funk would probably get around $2000 a sub and the amps you can probably get for around $6000 so for around $14000 you can have some of the loudest tightest deepest bass you can imagine, budget another $2K for cables, treatments, and amp stands.... That would be BADASS... Oh yeah and another $800 or so to wire in 220 for each amp would be an awesome touch too...