I'd recommend a Class A rather than a Class C. A Class A gives you a lot more room in the driver/front passenger area and a much better view out of the front window without the overhanging structure for the overhead bed. We started out with a 26' Class C, but found it too limiting for external visibility.
We switched to a 32' Class A and were very happy with it. Unfortunately, when we had the rig, gas was up around $4.50/gallon and, at around 8 mpg., we were spending more than we could really afford. We gave up after three seasons and are no longer RVers.