FERM I got a GM Question for ya

[csvencer]

So I have been looking at 07-09 Suburban/Yukon XL's and found a couple I like, my only concern is some of the Denali XL's have the AWD system vs 4WD the Chevy's have. Do you know anything about the AWD setup? I have always been a 4WD kind of person, I don't like the ideat that it is always on and I don't have an option to drop into 4Low. The AWD ones do come with either the 6.0 or 6.2 and are the 6 speed tranny, so there are advantages to going with it. Thoughts?

-Svence