Both are good choices! I love the power of the '08, but I like the comfort of the seats better in the '07. '08 prefers premium, but can run on regular, '09 runs on flex fuel E85, regular or premium, '07 uses regular.
You will be amazed at what a comfortable highway vehicle the H2 is. I think the Hummer haters will taper off now that they aren't made anymore and you see less of them on the road. Postings on
http://www.fuh2.com/ stopped in Nov of 2009 and Hummer made the list of the top 10 vehicles high school seniors (boys and girls) wanted if someone bought them a car. Actually, I've noticed an increased curiosity about the H2. Went for a physical and started talking with my doctor about hobbies and interests, and he asked if he could go out and sit in my H2 - he's thinking about one. About one fourth of the time someone will ask me at the gas station what kind of mileage I get. My standard reply is "over 11 and less than 20."