I have a couple questions about bi-wiring and bi-amping speakers. What receivers support bi-wiring to drive your front speakers? It appears Yamaha receivers support this feature, but Denon, Harmon Kardon and others I am looking at don't seem to have B speaker outputs for the front speakers. Can they support it through some funky setup? (maybe if they have Surround B speakers that are assignable to Zone 2, those could be fed the same source as the fronts and be used for bi-wiring??) What receivers definitely support bi-wiring or bi-amping? Which ones definitely don't support it? Also, if the speakers impedence is low (4 Ohms), would bi-wiring in a A, B setup help or hurt the Amp (it seems like it might hurt instead of help performance because the amp has to work harder to drive the 4 Ohm speakers, and then you put the burden of driving both A and B speakers at the same time. If you also had 5.1 surround going... the amp might be taxed? Any info is greatly appreciated!