I had a 2500 when I purchased my first fifth wheel. It was great to tow our 31' trailer but we found it hard to find a fiver with a pin weight (Which is now normally posted on the pin on new fifth wheels) low enough for the 6.7 mega cab 4x4. When looking remember to add the hitch weight which is normally more than 125 pounds. Went to a 3500 SRW and have a nice 32' fiver. The pin weight of the camper is critical as it is most of your payload weight. If you want a 36' or larger fiver get a dually. Not the easiest to drive around town but will handle most fifth wheel campers. Also, if you have a Mega cab you will have the "regular" bed so you will need a slider hitch or something that moves the pin a little aft so the front of the camper doesn't hit your cab while backing sharply. The 2500 has a large towing capacity but not much bed (payload) capacity. Highly recommend moving to the 3500 for fifth wheels.