I will shortly be moving into my new house and plan to utilise the 6 channel facility on my Rotel 1055 reciever. Problem is, it only has 5 amps in it so I need a seperate power amp for the centre back (it has a pre-out). Now, I can either buy a cheap stereo amp and bridge it or go for a more adventurous solution. What I'm wondering is if I could get hold of a 5 channel power amp, say a Rotel 1075 etc. and use one channel for the rear back and the other 4 to bi-amp my mains. This would leave the centre and rear surrounds on the recievers amps for now but I'm planning to go for a pre-pro solution later at some stage anyway. Is biamping possible with all 5 channel amps and how does one go about it? Do you just bridge the amps and hook a speaker out put to each post? Also, if this is the way to do it, can you bridge these amps into 2 pairs and a single? Any help appreciated.