I had an 07 Avalanche a couple years ago. Traded my first JKU for it. I'm back in a JKU again but I miss my Avy every day. Such a sweet vehicle. I will definitely have another one some day. I wimper just a little every time I see one now. Kinda the same way I wimpered a little every time I saw a JKU while driving my Avy. Make sure you're 100 percent sold on a JK before making the switch. You're going to miss the comfort, room, and power of your truck. Hell, I say keep it for a DD/tow rig and buy a cheap Jeep.
Oh, and...Welcome!