Actually, the 391 looks to be basically the same thing -- same watts too. I didn't have the greatest experience with ecost several years ago with my 3805. Took them awhile to credit my card back for a cancelled purchase and then the 3805 was defective in that turning the input dial just produced jumbled video on the screen.

Prices look good tho.

Denon x4500h
ADA-1000 x3
VP160HP
M5HP x2
M3OW x2 sides
M2OW x2 rears
M3 In-Ceiling x4