I really like the new chevy's, especially now that the extra cab has the normal opening doors. If you're thinking of towing or hauling a camper, I'd get the V8 for sure. The new V6's do well with empty driving or light loads, but I bet with any significant load the V8 will be much better to drive and probably get better mileage too.
- just looked it up, based on the 1mpg difference between the V6 and 5.3 V8, I'd definitely go V8.