I have a Arcam AVR 400 which is great for music. I use a Cyrus stremline XP connected to the Pre ins on the Arcam, using the arcam as a power amp only, and for my money its as good as similar priced pure hi fi.Cant really speak for CD's as I dont own a CD player.
The front speakers, KEF R300, are bi amped using the bi amp featrure, front L&R and Back channels configured to work as L&R.
This amp was a upgrade from a Denon 2310 which was great for movies but disappointing for 2 channel.
My advise is look for one ex dem of second had as there is nothing much that touches it for 2 channel unless you spend a lot more.
If your receiver has pre outs and music is your only concern you could add an integrated and save some money. I have a Yamaha receiver and although it's not bad with music my arcam integrated does a much better job with stereo!
I have just bought a Pioneer LX55 and it sounds fantastic through its inbuilt Airplay facility, really top notch (through Dynaudio speakers).
I also have a Krell amp to play with and although the Pioneer isn't anywhere near as powerful the end result is more detailed due to the lack of cables and wires - the digital files go straight into the high quality inbuilt DACs which is brilliant. In fact, I don't use the Krell...
In systems like this, speaker choice is FAR more important than electronics IMHO.