It's not practical to use SUT as pickup bed unless you fold up the backseat and drop down the midgate window and midgate. This is easy enough to do, everything is very smooth and folds up quickly. The problem with folding up the backseat for me is I'm 6 foot tall and have to move my driver seat forward to accommodate back seat folding. Not impossible, but not comfortable to drive any distance either. With midgate down you and your SUT are exposed to weather, so whatever you're moving needs to be in good weather (rains alot here in Florida and unpredictable to make a call to try this).
I've never heard any complaints about the midgate area leaking, or anything out of the ordinary leaking differently than a regular SUV H2.
I've seen a few SUT's with air suspension, they didn't seem any harder to find than a non-air SUT--overall while not impossible to come across, you've still got to try finding them.
When I was looking for our H2 in 2010 there weren't alot of them for sale in the Salt Lake area, though over several months I was able to find quite a few, just not the one I was looking for. You've got to spend a fair amount of time on the net looking over sites like Auto Trader dot com and ebay to get a feel for good pricing and areas of availability in the States. It seems like some areas like south Florida have a better, cleaner, low mile selection for decent prices. They also seem to be around the Phoenix area, though not always at the best price if coming from the dealers. A few Phoenix area H2's belonged to old folks, so if you can get to them before the dealer, you might be able to get a clean truck at a great price.
My wife and I both want to compliment our HUMMER collection with the addition of an SUT, hopefully before I turn into an old geezer myself!
