Speaker connections
Your pioneer receiver is at the bottom of the food chain. Since it can't deliver 100 Watts all channel driven, you probably wont see a significant perfromance difference if you bi-amp the mains.
To bi-amp speakers, they must have two sets of binding post and a jumper. Remove the jumper and connect one amp channel to each set of posts.
Cerwin Vegas are good for blasting music at frat parties and other large venues. If are setting up an HT system for a small room, check out some of the following option:
Onix X-LS (av123.com)
Axiom Audio
Ascend
Paradigm
PSB
SVS
. . .