Get the 3/4 ton. I had an 04 1500 Quad Cab with 3:92 rear and the Hemi to pull my 8500lbs Fifth wheel. Power was no problem, carrying capacity was. Found a great deal (in 2010) on an off lease 1500 Mega Cab (really a 2500 with a lighter spring pkg)with the Hemi and 3:73 rear. Night and day difference towing, still have the truck. I don't know why people try to jam all this towing capacity into a half ton when a jump to the 3/4 ton is miles ahead. If you can tow what they say with the new half tons, then the 3/4 to 1 tons are grossly under rated, or the half tons are grossly over rated!