Contour Enthusiasts Group Archives Forums Modifications Audio Amp Recommendations

With the Polk, you have a few options. The power is more than enough for the rears, and will push the Pro's just fine.
You could also use two channels two push the components and bridge the rear channels for the sub. If you have a decent aftermarket head unit, which I'm assuming you do based on the money you've already dropped on the speakers, it should be fine pushing the rear speakers. They really aren't that important for sound quality, anyway, just more for reaar fill.
This way, you wouldn't need another amp for the sub, just a box.