Depends where you're going. I find that ATs are much more practical for a full-size truck. How much off-roading are you doing? ATs will be much quieter for the 98% of the time you're NOT on a trail. And we don't get a ton of mud, especially this year. I've taken a few water crossings, but they mostly have baby-head rocks at the bottom, not thick mud, so AT does just fine to keep the traction you need. So for AZ off-roading, I'd go AT. If you're planning to take it elsewhere, factor that in. And of course, like every other post in this forum, this is just one guy's opinion. Keep us posted on what you choose.
Also, I really like the quad cab; very pleased with that choice over the crew cab, since I don't have kids. Slightly shorter wheelbase makes off-roading just that much easier.
In unrelated news, I pinstriped the **** out of my truck this weekend doing some off-roading in Gardner Canyon. Fun stuff, dry as hell, and now I've got some nice truck tattoos. Oh well, it's what I bought it for.
