I have the 2009 (honest, mfgd 4-4-08) Rockwood 2604 and it has the ZX600. I get digital pictures on the tv and it looks great. The Concertone system seems to work great also. as a matter of fact, I get 3 different picture on channel 7, analog, digital, and something else that I don't recognize.
I like the 12 volt operation but had a little scare on first trip out. Seems that the park breaker tripped and the TV was still working but the AC stopped like it does when the temp setting is reached. However, it did not come back on until I went out and reset the breaker. Now I know it works on 12 V.