I hoping to have my basement finished in the very near future and was wondering what I should be looking for in a sub. The floor is concrete and I do not plan on putting in a subfloor, just a thick underlay with a tight-woven carpet. The room size is approx 25'x35' with the HT area in a 10'x14' area open to the back and left side. I currently have a NAD T742 receiver with AR 310HO towers, AR AR2C centre and AR 206HO rears. I like the bass the towers provide for stereo music, so I'd only be looking for a sub for the HT if this makes any difference. Since I have the concrete floor would I be wasting my money on something relatively expensive like the HSU VTF-2(US$450) or Outlaw LFM-1(US$580)? Should I get a front-firing as opposed to down-firing sub? At the low end I was considering the David D-Box 302 or 303, 12" 150watts, since it's cheap here in Canada (C$250-300) and has relatively good reviews for the price, plus I'll be able to afford one of these a lot sooner . Thanks!