Having everything separate means having lots more connection points and the various wiring to connect all of it together so a good integrated would be the way to go. The old, worn out thought process said monoblocks, and all the associated stuff to go with them was the way to go but technology has come a long way and modern integrated amps sound every bit as good as separates.
As for WPC, chances are you never or rarely reach that 200 level and there are lots of integrateds that are rated at 120 or 150 wpc that will play as loud as you want (unless you're playing outdoors or in a concert hall). Peachtree and Parasound are two that come to mind.