My rest sepup would be:
Oppo DV-980HD - Source Player
Yamaha RXV663BL (optional) - AV Receiver
Wharfedale 9.2 - Speakers
'Would be'? Does it mean you have not yet got these units?
Anand, the combination of 980, Yamaha 663, and Wharfedale 9.2 should give you excellent music even from a Redbook CD. I have been listening to the Yamaha 663 with a Pioneer 610 DVD Player, and the music is really good. I am sure the Oppo 980 will only improve the sound from the system.
If need be you can bi-amp the Wharfedales 9.2 using the Yamaha 663.
I fail to see how any amp in the 20K bracket can improve the sound from this system combination. If you are looking for a qualitative jump in sound quality, you must look at a CD Player, a dedicated 2 channel amp, and maybe even more expensive speakers.
See how you can extract more quality from the Oppo/yamaha/Wharfedale combination. Look at manageable things such as better cables, better interconnects, good stands for the 9.2s, and maybe even a small investment on your room acoustics. These will go a long way in improving the sound quality than any amplifier that you can get.