Why my system has detail but no body & warm vocal?

The other thing that you should consider upgrading is your stock CDP. No stock CDP short of perhaps a Meitner, Accuphase or other equally expensive deck will have a warm, full-bodied sound.

Both Phd and Sean have hit upon the most important factor in buying and amp, that is output impedance. Lower is better and you probably will not find it in an integrated. If you want the amp to be able to drive any speaker load, you have to think "lots of output transistors". 16 per channel is about right for complete independence from load effects, but the design is also key. Amps with zero negative global feedback tend to be thin sounding and cannot control the bass. Look for an amp that has low output impedance, reasonable power (>200W/chnl) and some kind of global feedback.