Should I keep around my NAD 3155?


Here is my current system:
NAD 3155 integrated
Thorens TD 145 (with Denon 110)
NAD C515BEE
Gallo Due speakers + Gallo Subwoofer

I enjoy it hugely, especially the Thorens, but I'm wondering if I'd benefit from upgrading the integrated. I'd prefer not to spend more than $1,000. Should I consider upgrading or should I just stay put?

Thanks!
dlieb
Yeah, if I had more patience and know-how, I'd be happy to work on the 3155. However, I am not inclined to do any work on my amp. It has been checked out and cleaned recently, though.

I am getting very tempted by a Analogue Audio or Creek 5350...
Dweller, the new NAD integrated is the c390 DD. Stereophile didn't have a pic on hand. I am curious as to what it's final price will be.