which is a better Amp & does this pioneer model better than the yamaha in movies??? also i read that this pioneer model is not v.good in stereo?? i will be using it with: (not going to upgrade them anytime soon) Wharfedale Diamond 8.4 fronts Diamond 8 Center for rears i now have a pioneer S-D55 but i think i will get Diamond 8.1 for rears Sony NS-305 DVD player. so which do u think is better??? also i know that the 750 only has prologicIIx which the pio don't have & maybe the 750 have more powerful amp. so what do u think.