I have an Arcam AVR300 that is bi-amping my B&W 604s3 mains. I have an Arcam CD36 source CDP. The AVR300 does a good job to drive these speakers, which are power hungry. I know because as i was driving them in just bi-wire mode i was hearing under-power distortion. Bi-amping that AVR300 definitely changed things for the better. This will work for you until you can get a dedicated Amp, but after hearing it, you might consider putting funds towards something different as I did with the source. Also, careful placement of my 604's made a huge difference for me as well, 42" from back wall, 7 feet apart, toe-in slightly, sitting about 7 to 8 feet away. Man that was a big eye-opening (sorry for the speaker placement tangent)