My room size is 12x19 and I am trying to decide which subwoofer to get from Crutchfield. With my budget I have the choices of the Polk PSW 10 or 12. The ten is 50 watts and the 12 is 100 watts. The other choice would be the Infinity ps10 at 250 watts. I am running Polk speakers. Are there better subs at best buy or circuit city then the ones at crutchfield? Or is my best bet the STF-2 from HSU research? Please if anyone can help me I would appreciate it.