We're new to motorhome life but we've learned a lot in the past year. We started with a gas powered 35' Winnebago and traded for an Allegro Phaeton 40' diesel pusher in less than a month. It's a different world with air brakes, air suspension, diesel power in the back, etc. There is no comparison in comfort, quiet, soft ride, power, etc.
The biggest problem we have had is with service. We have worked with four different RV service centers and have been very disappointed with the quality of work. We purchased the Tiffin Allegro Phaeton because we heard great things about Tiffin. We are very pleased with Tiffin in Red Bay, AL -- however, the dealers we have experience with leave a lot to be desired. All this to say, if you're considering a purchase, find a good dealer first! Hang out in the campground if they have one and talk to people. See what people are saying in the service waiting room. Ask around. We have found that truly good quality service is difficult to find -- at least in our area (Northern New York).
Good luck