There are a plethora of different brand used Class C's for sale that will fit your needs.
My personal advice?
Buy any Class C with a....
Ford V-10 Engine on a E-450 Super Duty Chassis
Power to spare and a chassis that just doesn't quit giving you a good ride AND steering. Just look on the fender if it says E350? Keep on walking until you find an E450 Super Duty! You won't be disappointed. :W
AND You won't ever be back here on the forum in the future complaining about ride, handling, power etc. If you buy the V-10 E450 Super Duty!:B
Good luck hope you find the perfect RV for you and your family to make wonderful RV'ing memories. :C