I have an '06 with 215,000 miles on it and have found it to have plenty of towing power, both for my TT and 6 different trailers I have for my business. Like others have mentioned though, there are issues that may come up and can get costly. I believe I went through all of the ones mentioned already, and do remember putting up to $12,000 into the truck in repairs one year. Head gaskets blew at 172,000 miles, and ironically temp only rose when pulling trailers uphill, whether empty or full. Had studs put in, and complete wiring harness replaced due to electrical issues at that time, and the truck has been a pleasure ever since. Have had many different trucks in my 40 yrs of driving, and currently have a few different diesels, but the Ford has been my favorite and hope it keeps going for many more miles. Good luck with whichever you choose to go with, as you will probably not be dissapointed with any of the "big three". Enjoy your travels.