Just that if you went to a bigger room the larger subs can make the transition easier than smaller ones :). A fairly small sealed room like yours could do well with the 12s but if you can do the 15s I don't think you'll be disappointed. I think Rythmik PSA and Monolith all make very good subs....just depends on your spl and extension goals and budget as to what makes most sense for you. I think Hsu is a bit better value than most, but then I just DIY personally.\n\nI totally agree, and given I'm going to buy one first and get the 2nd one a little later, I feel getting a bigger sub now might work better for me, so I'm trying to investigate as many options as possible. I really only found out about the other brands a few days back, I had only known SVS, Monoprice etc, because they go on sale often.