I have Polk Rti12's for my mains and a CSi5 for my center.Receiver is a Pioneer 1014....It has some nice power and my speakers sounded great but I added 3 Outlaw M200 monblocks to power them and there was a noticable difference.A cleaner fuller(fatter) sound....
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Panasonic 50 HDTV Plasma
Pioneer 1014
Polk RTi12 (front)
Polk CSi5 (center)
Polk RTi4 (rear)
Velodyne DLS 5000-R Sub
3 Outlaw M-200 Amps