I have spent 6 months with CA 650A and Polk Audio TSi300. Both products in their own respect are good budget products. Together they are bright. As I later found out, the weak link in that pairing were the Polks. Why? - In my effort to improve on this combo, I tried NAD C316BEE, Marantz PM7003 and A-S500 with Polks. Again very good products, but I didn't see much improvement in the brightness. NAD pairing was the best, Marantz a touh more musical than both CA and Yamaha, but CA has a neutral character which makes speakers sound as their true character. CA will be a good match for Wharfedale. Will allow the wharfedales to produce their natural laidback sound. For Polk look at NAD C316BEE. Although, my suggestion don't look at Polk at all in that range.