So many questions - so little money.

Okay, first question. I'm thinking about going into home theater (slowly) and want to know what to buy in the way of an amp. I spend much more time listening to music and am a jazz/classical fan. I already have a home stereo with separtate amp and tuner. It seems to me I could keep the tuner and just buy an amp.

Room size: 15 x 20
Current gear: Axiom M2i (front), EP175, ancient denon integrated amp, harman/kardan tuner and cd player.
Budget: $1000 - $2000 (USD) for the amp.

Any recommendations? Thanks!