Hmm.
I just bought an NCS812 with DME. Looks great, but since it is not installed, I don't yet know. The NCS812 is a derivative of the Mark 12D, which has a very good reputation. I have one Mark 12D, and it is way better than the Garmin 430W as a Comm radio, and has substantially longer range as a Nav.
Everybody makes fun of me for buying a Narco, though. Don't get one if you want to be one of the cool kids. You'll end up eating lunch with the Math Club.