I say any mid-sized PU/SUV with a least a 3500/4000lb tow rating (Danny' & Tony's seen here are 'great' examples) I favor having a bit of 'overkill' = more than what is needed which usually equals to bigger/better brakes along with a full perimeter/box frame along with also getting more power than you will ever need. The thing to do before you buy your next tow vehicle is if you are still able to do so? - and that's take your present trailer to the weight scales and 'actually' weight it - not some "I think it weights this or that" - it can be done at a 'Cat Scales' = usually located at some truck stops ($13 last time I used them) or 'depending on your state', some states leave their scales turned on after hours for truckers usage = many a time I have used them here in Wash. & Ore. when they are not open. Have spoken with many a person who is towing a teardrop that has 'no idea' what their trailer weigh is yet says it weights a lot less than what it actually does (and yes, I know this being so many times their trailer is bigger along with them carrying more stuff yet they say it weights less than mine which has been weighed) The PU I am using has a max tow rating for up to a 7000lb trailer - my trailer comes in at just below 2000lbs loaded (empty trailer started at 1400lbs = now at 1780lbs loaded - +++ awnings,propane,roof rack etc,etc) - with everything loaded up. This puts me well below it's max tow rating which thus equals the not having to worry about the 'overtaxing' of it all like I see so many of these small car based vehicles doing when towing their teardrops. My PU has a EPA rating of 21MPG combined = which is what I am averaging everyday empty - when towing I am averaging just shy of 19MPG fully loaded. Take care and stay safe..........
PS there was a limerick left here on this website a few years back that I always liked which kind of pertains to this subject ""you can go too slow down a hill forever - but if you go too fast, it could be your last""
