In defense of Texas being flat. 90% of the state is flat with some long gradual hills here and there. There is one small area of the state where you can encounter mountains. I recently towed from Houston @sea level to Alpine, Tx @4475 and not once encountered a "mountain". You have continue past Alpine and head toward Big Bend National park to hit any real mountain climbs but even then most of those are short. Anyway I did this in a Honda Ridgeline towing 4500# and loaded up. Pushing 10,000 combined weight, the max for the truck. Almost every truck and trailer on the road was going 60-65 mph regardless of truck style/type/motor or trailer size/weight. There is so much more to towing than whats under the hood. The Ecoboost is a good set up but then so is the 5.0 or Chevy 5.3 The truth is the automakers have gotten us hooked. Every new version is better than the last but is it really? Buy a truck that suits your everyday needs and can tow what you have or want. there isn't any need to over kill your truck. Its ok to run it to the limit for the 10-15% of the time most truck owners tow, they are designed to do that. Happy towing. And remember Gun Powder and Whiskey don't mix so try not to spill any in your drink this July 4th weekend.