I had the nad C340 + Wharfedale 8.1's. I wanted to upgrade the amp and got the cyrus 6vs, but was disappointed because the amp was more revealing of badly recorded cd's and there are no tone controls to compensate. I had lost system synergy and missed the fact that the nad made all my cd's sound nice.
I eventually also upgraded to arcam cd192 and spendor S3/5R but still miss the fun I had making cassette recordings with the nad amp.