Looking for a 5 channel amp that is warm sounding

I currently have a Monitor Audio Gold GR series 5.1 setup. I am running it with a HK DPR-2005 receiver, which is their higher end digital amp (it has been since discontinued). Maybe this receiver is the root of my problems, but the only thing I am not thrilled about my speakers, is the highs have a slight edge to them; maybe a little bright.

I am looking in the $700-1200 range used. If I can find what I am looking for in a 3 channel amp, I would certainly be willing to go that route as well.

Am I barking up the wrong tree in trying to find an amp for my solution, or should I start from scratch and get new speakers?

Thanks
Greg