Hi, I am going to be purchasing a truck in the spring to pull a 10,000 lb gvw trailer and I was wondering if a half ton pickup would be enough to tow it. The most I will ever tow is approx. 6000 lbs on trailer. I was thinking of getting a 1500 or 2500 GMC. 2WD or 4WD? What would you guys recomend?