Great integrated amps with narrow depth under 12 inches?

The Nuprime stuff is excellent and in fact because of design has plenty of power. It will bring things alive in a natural way and will have excellent base control. I think they have a 30 day audition. I have the Reference 20's now and had the Reference 9 monos before. Very different (better) than all other Class D that I have tried

The Bells Area is unfortunately too large, albeit only by a bit. As is the Hegel. But thanks for all the suggestions everyone! Still considering the Nuprime. Also considering keeping the amp and getting a miniDSP with Dirac Live instead. Of course that's upgrading the sound in a completely different way, but still. 

Bel Canto 5i is perfect and sounds amazing. 

Thanks for the tip, the Bel Canto should fit. I must admit I have no knowledge of this brand, but I guess I should start reading reviews etc. What sound characteristics would you say the 5i have? And does it do well at lover volumes?

Carlings, you've found the Nad lacks with detail?  Have you ever experimented with replacing the preamp jumpers?  When I did this on my C326BEE, added highs gave more resolution.  I've also owned the C372 and found it laid back, but I never replaced the jumpers on that one.  But the detail available with the 326 is actually pretty good for a budget integrated amp, though I've got upgraded speaker and RCA cables as well.

If you have some extra  good quality rca cables, it might be worth a try.