How large is the room? I don't mean sq ft, but Volume. LxWxH in cubic feet.
As for a 500$ sub, look no further then a HSU Research VTF2mk3. In SoCal, you can pick one up at there cheesey, industrial space offices for 10% off *pays for tax+! and the nice guy will help you load to your car::
Go the the HSU site and look at the room calculator / You MIGHT not even need to spend that much, if your system is in a small to medium sized room.
Than comes tuning / placement follies. Also, is the wife on board with this?
Jamey- maybe not as big as you want but REL is a good price for the quality. Not the horsepower of the Hsu though. Another I have looked at is Epos ELS. Perhaps also not as big as you want for home theater.
Art- I guess if you insist on giving me the REL205 I can change my plans.
I was thinking of the REL T2 for $800 new, an Absolute Sound "Product of the Yr" '07. New, and close to what I paid for nothing on A-goN.
This is for 2 channel music with the Rega Mira 3, Apollo and Quad11L main system. Actually quite listenable but I am used to having a sub on small monitors after many years with the Rogers +sub.
I had a T series sub before the R. Very good just a little better for HT than the R and not quite as good for music (these are miniscule differences we're talkin' about)...though with the quads it may be a very good match.
Jamie, the room being even multiples of 8feet makes it a monster for placement. BTW, your room at 2300ft3 is not all that large. Put 'room mode calculator' in google and enter your room dimensions.