N8 voice quality was pretty damn good out of the devices I've used (from RIM, to Apple, to Android/HTC/Samsung).
I can't say if the radio was any better. Same with the N97. I think they're so similar now-a-days its hard to tell... of course I saw the iPhone4 grip-of-death better so point for Nokia and the others for not wrapping their radios in metal... hehe.
