bbpj - have to ask, what amp/speakers are you running with your 950. By reducing the gains on my Parasound 2205 (by 1/4), I greatly reduced the hiss. Does your amp have manual gains?

Also,"when it ended I heard hiss from my speaker about 5 feet away". So during playback you heard what, hiss or the music?
What CD? I think we all can agree the some cd's hiss (Some louder than others) between tracks. You should continue to experiment/play around with things to try and lower your noise.

Hiss from 5 feet is far, how loud where you listening(you were studying, hence assume low). Have you calibrated your system since adding the 950?

Was your NAD a receiver or seperates? My Denon 3200 receiver is probably less hissy than my 950/2205 combo, but at the same time hiss was still there. Thing was I never even thought about it until this cropped up on the 950.