Buy from Crutchfield, thy have 30 days no question asked return policy.
I had one and thought it sounded pretty good. I bought it for the bedroom system and it had more than enough power to get things moving. My main issues (only issue really) was the volume contol. It is very touchy (moves fast!) and did not balance right and left until about 11:00-12:00 on the dial.
I returned te unit. If I were to keep it I would need to have the gain lowered.
I know have a benchmark DAC1-HDR and a cheap Rotel 1072 ( class d) amp that I got off eBay new for $500.
At the end of the day I would say the current set up over the Nova sounds about the same but with a little more bass punch. But the Benchmark is built MUCH better. All in all it is prett good for the money but I could not really live with it long term. Again buy it from Crutchfield, they even paid shipping both ways. My total bill was only $7.00 when all was said and done!
PS, I forgot to mention I was using B&W 703s with the Nova.