What happened to the Navigator?
You could pull that size trailer fine with a mild lift and 35s. The stock tires on my Ram are 33.2" and I bet you could run 35s without any lift, or at most just a front leveling kit. My only advice on lifting is to do it the right way and not the cheapest way. Once you narrow down a specific model, go to a message board for owners and find out the right way to do things.
If you're lifting and driving offroad a lot I highly recommend a Ford or Ram over a GM. The SFA is stouter, performs better offroad and you should have fewer issues with it than you would with the IFS on the GM trucks. Plus if you go diesel, that DEF tank is just asking to get smashed. If you're going with a gas model I would highly recommend checking out the Powerwagon because you don't have to void a warranty to get the things you're wanting to add, and it performs well right off the lot (maybe the tires need to be upgraded, I'm not sure what they come with stock).
