I am casually truck shopping (waiting for 2014 models) and trying to fit a tow vehicle to a future 5th wheel. Most of the 5er models we like are in the 9000lb-11000lb dry weight and 12000lb-14000lb G...
While a SRW might have the capacity, a dually will be a much more comfortable tow. I could not believe the difference the dually made. I never feel a semi pass, and never feel cross winds. Yes, one can almost forget it is back there. I don't find the duals make it any more difficult to park. I have a crew cab long bed and the length is more of a problem.