I have just integrated a nait xs into my home cinema system. The stereo sound is an obviouos leap forward compared to my onkyo 905, and i am so glad i decided to take that step. What i wasnt expecting however was the inprovement to the front end of the surround sound system. It is somehow more solid, smoother and more way more seamless than before. I am very happy with the stereo sound, but now i have set everything up on the AV side of things too, and noticed these improvements, i am simply chuffed to bits!!!
Would the different speakers in your set up not be affecting the surround performance more than the av amp itself??
Panasonic 42PZ82B, Sony BDP-S760, Onkyo 905, Neat Motive 1 fronts, centre and motive 3 rears, SB8 sub, Virgin +, 360 Elite, Nait XS-2, Rega Apollo CDP, Chord chameleon, Chord Oddyssey 2, Chord Powerchord, Clearer Audio Copperline Alpha