So maybe being that the ascends are so accurate to begin with, maybe the proceed is a better match to my speakers. I dont think its that the proceed is "warm" compared to the NHT, I really feel the top end(high freq.) is more refined and less harsh than the power5. I am fairly certain its not the recordings being I have demoed some pretty solid and well respected music. The Ascend sierrras are certainly not harsh either, in fact they are less "harsh" than the 340's were. I know because I have owned the 340's, 340SE's and now the sierras.
I do enjoy the power5's ability to play extremely loud & clean, an excellent quality for home theater useage, but maybe not critical 2 ch listening? I am still on the fence.
I will listen some more tonight and make more observations.