Without a doubt and never looking back I'd put a tire on there that would last 90/100,000 miles and be done with it!!
My favorite tire would be the Michelin« XC LT4. That tire is considered one of if not the best RAIN tire ever made..
I have used it on many street vehicles and light pickups.
My wife's Suburban had a set on it for 90,000 miles and I took them off after 6 years on the road.. Although they still had legal tread.
As for the front end you just have to wiggle and pry the components around to find what is needed. I think I would allow a front end shop to get involved in that work. The dealer is about the same price as any other front end shop and usually do a much better job at aligning.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />