I have a quad cab 4X4 Dodge 1500 with the Hemi motor in it. It has the full tow package, with the transmission cooler. I bought the brake controller at TS for a minimal amount of money. That being said, I also use my truck to haul hay, feed, and wood (for my hobby). My trailer is a v-nose aluminum 2 h sl with a large dressing room. I can pull both of my horses and have the dressing room packed with feed, hay, and camping supplies in the mountains without overloading the truck. I also used it for emergency hauling 2 large horses and 1 small horse for a short distance in the mountains...again, without overloading the truck. With the adjustable brake box inside, I also had plenty of stopping power. Gas mileage without a trailer can go anywhere from 14 - 18 mpg (according to the roads); with the trailer loaded it ranges from 11 - 13 (once again according to the roads). My old trailer was a 2h steel with no dressing room. My mileage generally dropped down to about 10 mpg with both my horses in it. I only had it for about a year and needless to say, with the difference in mileage I've used the new one more in the past couple of months than I used the old one the entire time I had it. I personally wouldn't use anything less than a V8 motor to haul 2 horses unless you're just going to use it to drive semi-flat roads.