1. MX-3000 with new MRF 300 with multiple repeaters. It is supposed to be released within a month, Hopefully. Also, no one has any experience with the new MRF-300

2. RTI T2+. Not a regular touchscreen but might do the trick.

3. Tablet PC's with something like Charmed Quark software. Haven't used so I can't comment.

I'm not sure if you would be able to do what you are looking for with the CAV 6.6 or System 6 with only IR control and not using keypads to control each of the zones. Something like 2 Marantz ZS5300 might work for your application. You'd have to buy separate tuner(s) though.

We did a very simple system with this. It only had 2 sources and 5 rooms and we used 3 wireless Prontos but range wasn't an issue.

Bob