Looks like a great system. I would probably swing for the FV15HP over the F25. The FV15HP has a beefier driver and the ports will give you bigger output down lower. Either one will be great though. Your proposed AVR does have the ability to calibrate two subs independently though, it's a shame to waste this ability. You might also think about two F15s. Two Hsu VTF3s would be killer as well, and probably cost less than a shipped F25. You might also think about getting a F15HP now and getting another later for maximum sound quality. To be honest, between the F25 and F15HP, I would go for the F15HP, it has a better driver and could possibly have better sound quality.