if you already have 2808, don't waste money go up to 3808. the difference is very small. use the money to buy a 5 channel amp. the 2808 will act as pre/pro only
Rotel is a very good choice for amp. the 5 channel RMB-1075 only cost USD$999. and it has 125Wx5 and 200W into 4ohm. (good enough for 805s)