From everyone I have heard from child seat forums to RVers, the Expy EL 3rd row is more spacious, both legroom and seat width. Unfortunately, there is no 3/4 ton Expy EL. The Expy has a little more payload, but loaded up Suburbans have on the order of 1200 pounds of payload, not much for a large family and a TT large enough to house them.
Which is why I'm planning to purchase a 3/4 ton Burb. And both access and seating comfort should be better with second row captain's chairs that I will get. Longer legged people can stretch out putting them between the middle row chairs.
Why not a full size van? Even my 5th row has captains chairs and a flat floor. And even an E150 van has double the payload of a 1500 Suburban.
2000 Ford E350 DRW Wagon (14-pass all captains chairs)
V10 w/ Banks PowerPack, Diablo Predator, 4.56 LS, ~350,000 miles
New Desert Fox in the works!
There are plenty of reasons why full sized vans depreciate so much - no one wants them. The fanciest OEM ones now have lower equipment than Expy XL and Suburban LS, despite the XLT and LT trim levels. I like quad captains chairs with heated (and cooled in some cases) leather seats, 3-zone automatic climate control, large touchscreen display with backup camera view, and 4WD.
I'm fine the the 3/4 Ton Burb. Really wish Ford had an Expy EL with the equivalent of the F150 HD package, including Ecoboost.
A & A parents of DD 2005, DS1 2007, DS2 2009 2011 Suburban 2500 6.0L 3.73 pulling 2011 Heartland North Trail 28BRS 2012 VW Passat TDI