I'm looking at getting a Promaster and converting it to a camper. I think I'd want the 136" wheelbase and the high roof but is there any real reason to get the 2500 over the 1500 for a $1000 extra? The dealer told me stronger springs and shocks but that certainly doesn't add up to a $1000 premium in my opinion. I may, very occasionally (twice a year) tow a very small, light car on a dolly but no more than several hundred miles at the most each way. I certainly don't expect any camping conversion equiptment I install will add more than a 1000 lbs to the GVW.