I don't agree entirely with the idea that a ported or bass reflex design has less distinct bass reproduction that an acoustic suspension one. They are different, to be sure, but an excellent bass reflex sub can be tuned to be very exact and musical. The key is tuning. I won't deny that I spent quite some time with my SPL meter setting up my SVS sub in just the right location and at just the right settings. This was also because my mains emphasize the mids and high frequencies instead of the lows, but that is how I wanted it. If you can afford it, I highly recommend the ICBM from Outlaw Audio, perhaps the single most important addition I ever made.

For your room, I agree with Bryan that you should consider a pair of subs. If you go with SVS, you can get a pair of passive CS-Ultra Subs with a 1000W amp to drive them for just over $2K USD (cables included!). Add a $250 ICBM between your preamp and your amp, and you will have something nothing in that price range can touch. If money is tight and you have an old amp laying around, consider a single passive 16-46CS Sub for less than $480. If you tune your system just right, it will still make all your friends drool, even when you are listening to Handel at low volume.