Towing capacity of Sprinter motorhome

I've been following this discussion as I am in the market for a new(ish) MH to replace my current Lance Camper/F250HD rig. I sometimes tow a Jeep TJ and the F250 tows it fine on most roads - I was down to about 25 mph going up 9 Mile Canyon in the Sierras. Narrow twisty road with a lot of rockfall so most people don't go very fast on it anyway. I just went to the Pomona RV show yesterday and looked at a bunch of Class C's - most were on Ford chassis with the V10, one was on the Chevrolet chassis with the 6.0 liter V8, and some were on the MB chassis. After trying out the driver's seat in each I have it narrowed down to the MB. At 6'4" and 220 pounds the Ford is just silly - the only reasonable way to get into the driver's seat from inside the coach was to grab the edge of the overcab area and lower myself down into the seat. And I still had to maneuver my size 13's around the ridiculous doghouse. The Chevy was a little better but the MB was a dream - walk into the seat area and sit down. Also the seat went back far enough for my legs to be comfortable (36" inseam). So I'm now looking for a late model Itasca Navion or Winnebago View with the corner bed and the 5,000 pound hitch. If it doesn't work well towing the Jeep I'll leave the Jeep at home and take my dirt bike - at 300 pounds it should ride on a hitch rack and if that doesn't work I'll put it on a trailer. No way will I put up with the cramped driver's seat of the Ford or the Chevy.