I currently am running on Onkyo TX-NR900 receiver with my Polk system. (RTi12 mains, CSi5 center, FXi3 surrounds.) I have decided that the Onkyo just doesn't have what it takes to run the 12's. (1x1" tweet, 2x5.25" mids, 3x7" woofers each)

I've been looking at getting myself a pair of the 200's and was wondering if I would be able to do a bi-amp setup with the Onkyo. In other words, I'd use the F/R and F/L outputs to run the mids/tweets and the 200's to run the woofers. The only reason that I ask is that it just kills me to lose those 2 channels on the Onkyo. (I just found out yesterday that the ratings for the Onkyo are based on 2 channels running rather than 5 or 7.)

What do you guys think? Any suggestions?