I think you can do much better than Rotel for the money you want to spend...and even more so if you are willing to buy used. I am using a Bryston B60 with CDM 1NT's and am happy with the sound however, it would not be enough power for the 9NT's I believe...maybe a Bryston BP25 (or BP20 if you dont need a remote) and a Bryston 3Bst combo would work within your price range...that would be used, but keep in mind...they have a 20 year transferrable warranty and most audiophiles take impeccable care of their equipment.
just my 2c
Ellery
just my 2c
Ellery