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...
I agree that you are on the right page. What I meant to say is that the SRW is not as happy close to its max payload as the DRW, so pin weight over 70% of maximum I think is more noticable on the SRW.