Curious where you got that payload figure. If that is what it is then, I would be better off buying a Tacoma. The numbers I have seen are much higher than 1500 lbs, IIRC my '05 PW was around 2000lbs.
Looking at the Ram 2014 brochure the towing/payload specs for a crew cab 4x4 with a 6.4L Hemi, auto and a 6'4" bed is 15,580 lbs towing and 3,250 lbs payload. GCWR is 22,500 lbs and a GVWR of 10,000 lbs. The brochure does not give specs for a PW unfortunately.
While at the Dodge/Ram dealer in Prescott Az. I checked out a Laramie level PW and they ran the VIN# on it and came back with specs of 15,450 lbs towing, 3,144 payload, curb weight of 6,850 lbs and 22,500 lbs GCVW. The PW does haul less than a standard gasser 4x4 which I would expect and if the figures I have gotten are correct they are not bad. In the short test in the Overland Journal (last issue) they give a 18,500 lb GCWR but no tow/payload #s, which is a huge difference, have to say I don't know what to believe.