The new VTF 2 is a 12" driver compared to the STF 2 with a 10" driver. I would opt for the new VTF 2 in a room of your size. I have both the VTF 2MK1 and a STF 3, it is all but impossible to hear a sonic difference. As far as the output it's no contest the STF 3 in the hands down winner.

Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud