if music matters as much as AV, and maybe more, then an entry AVamp will (probably) not make you completely happy on the CD/music - that said, you've got to start somewhere. And going 5.1 AV does mean a lot of spending on AVamp, telly and speakers. So dont be put off. the AVamp you buy may be the best amp you've had to date - and all is relative.
if you search on 'stereo' in this or HiFi section you will see the argument.
essentially, the idea some of us have implemented is to have an AV system and a HiFi system that is linked. Thus
1) the DVDplayer is fed into the AVamp; the CDplayer is fed directly into a stereo amp which feeds the main L/R speakers
2) in order that the main (stereo music) L/R speakers can also be used as part of your 5.1 AV speaker set up when DVD/TV is used, the L/R front pre-outs are connected into the stereo amp.
This may seem overly complicated at this point, unless you have the cash to splash out on a stereo amp. I was given similar advice & squared the circle by buying s/h AVamp (£300) and s/h stereo amp (£300), and I'm happy. S/H prices for the AVR2802 have fallen, so you could get a bargain at about £200. The AudioLab 8000S has held its price, but you should be able to buy something reasonable, though old, s/h for £250.