It's funny you brought this up, we are looking for a replacement for our 97 Expedition that has been in the Emergency room and therapy for too long. It has the 5.4. We have looked at a 1500 Chevy, and a couple of Excursions. We drove a V10 Fully loaded. I loved it but admit it sits high, and is a bit jarring on bumpy roads (wife wasn't impressed). But the room and layout is the best. The 1500 drives really nice, is really low (easy in and out). I don't know what they were thinking about the third seat thing. It stinks getting in and out and there is less room then my Ford. 2500's are really rare. I found 4 (new) in New england, that's ME, NH, VT, MA, CT, RI.
The 1500 will do what I need, but I would feel more secure with a bit extra. Anyway, hopefully will test drive a 2500 this weekend. One nice thing is that you can see the motor (at least the 5.3). On the Expedition the last four cylinders where under the dash and a pita to work on.
The Excursions I looked at were both Limiteds. The V10 '05 had 20k and was 31,000 with room to haggle. The other was a '02 7.31l diesel for 32k. Not sure on wiggle room or mileage.