After about a month of searching and research I finally found the truck I wanted. Sold my 03 Silverado 5.3L and will be selling my 08 H3 3.7 later this week.
I found a 2010 Silverado LT crewcab Z71 with 20k and a 6.2L. It's leather which is a first for me, I'm not the fancy type when it comes to trucks. Within 30 min of signing the paperwork it made it's first trip to the dump with some of hurricane Irene's gifts. The power has been pretty impressive so far but I will probably throw some long tube headers, an intake and a tune in her just for fun.
From what I've read there is little gain by doing a cat back due to the stock 3.5" exhaust. I'll keep looking to see what I find.
The 295-65-17's have a decent amount of road noise which I think a will go away by removing the exhaust resonator. Here's some pics I'll update as I upgrade( just a few quick snaps)