I can't quote any weights, but I know from the Dodge Diesel forum that many guys who previously needed a dually were able to step down to a SRW with the increased payload/towing capacity of the newest generation trucks. I don't think you can beat the stability of a dually though for that heavy of a pin weight. I agree you could get used to driving a DRW pretty quick, not that different if you're used to a crew cab longbed anyways. You could always get a commuter as well... I sure miss our little Volvo wagon when we go to the city now that my wife has stepped up to a full-sized SUV.
2012 Jay Flight 29QBH
2003 Dodge Ram 2500 Cummins H.O. 48RE
Equalizer 4-pt sway control hitch
Prodigy P2 brake controller
2006 Jayfeather 29Y (past Jayco :))