The 6.2 is a great hauling engine, but to answer your other question, I personally feel that on big trucks/ SUV's, AWD is far worse than 4WD unless your are regularly traveling down snowy or icy roads. It will kill your gas mileage something fierce, as I believe 2014 and older Escalades (and Deneli's) use a full time AWD system that clicks in over 25 mph. In your situation, I would suggest a 2500 series Suburban or Yukon XL (non-Deneli) with a part time 4WD system. More capability and better gas mileage to boot, as those are 2WD until you decide to engage the 4Hi or 4LO. Some higher trim GM SUV's also have a full time 4WD button, which is AWD that you can turn on or off if the need hits.