I had a thread just a week or two ago about renting a new Ram 1500 4x4 w/ Hemi. I can't seem to link anything with this little iPad but should be easy to find under "Ram".
I was expecting it to have balls, (it did), what I wasn't expecting was how well made and engineered it was. I've rented plenty of new PU trucks and it seemed better than the others but then I have not tried the very latest GM or Ford which are all complete redesigns in the last 2 years. Anyways, it had the best, smoothest transmission I've ever seen. 8-speed and drops cylinders whenever you're not accelerating, could get good mpg w/ light foot.