Not to offer you anything others hear have not done so...but more to offer what many of us go through at the beginning in determining the "right" tow/trailer combo.
First and foremost we learned was personal preference offered up through the advice.
Second we learned that safety should come first - beyond $'s, looks or even vehicle conveniences.
Third was the technical jargon ...HP, Torque, V6 vs V8 and of course Wheelbase
Fourth is the style of use - will you be camping all the time, towing and dropping for the summer or winter. Where will you be towing - mountains or flats or neither or occaisionally for both or just out and about with mixed rolling terrain. Style of driving Keep up with the "jones" and push the mountains at 70 or take you time and work your way. Take the extra time to enter - and let the rules of the road prevail (you know move over for entering traffic) - or push the limit to come off the on ramps at full speed.
And Fifth thing we learned was to factor in worldy possesions What to take and what to leave behind - what to pack in the trailer and what to pack in the vehicle.
We started off with a Kia Sorento 4x4 (had it before the trailer) picked up our 69 Globe Trotter 21' 3330lb dry with 390lb tongue Now looking at it - she had 192 hp with 217lb of torque at 5500rpms - compared to the Jeep liberty at 210HP/235lbs at 5200rmp or the Tacoma 164hp/183lbs at 5200 The truck wheel base is longer and would give you a more stable ride in certain situations. Torque many say is what you need and I have to agree. If you are doing mountains all the time I think this would be the area to look at the most.
The little V6 in the Kia hummed like a sewing machine whether she had a trailer behind her or not - she was peppy and had no troubles with pulling the GT home dry. The question for us was how much stress were we prepared to put on her when we started to load up - where were we going to travel and in what conditions. Doing weekend camping trips around home and the odd week vacation would have been fine - but loading up to travel south for a Month in the middle of winter was what we were facing.
Tow ratings from manufactures we found out are lets say they just don't have any standards. Take the Kia for example - the year they came out with the Sorento it was rated 3500lbs with trailer brakes and 1500
without. The next year the specs came in at 5000lbs with trailer brakes and 3500lbs without. By the third year it was dropped back down again. We contacted the manufacturer to ask why and how it changes when there was absolutely no change in any of the specs. Kia builds the car with an undersized cooler which can overheat - so basically change the cooler or add to it and you have the ability to tow remove it and you don't. So their solution was they did not want to deal with towing issues - so they dropped the figure on the specs. They did not want to offer any type of tow package - now they do 4 years later....with virtually still the same engine specs.
At the end of all this we settled with a very simple formula that made the most sense. 75% of Vehicles tow rating. (Trailer weight, Liquids and cargo including fur babies and us must not exceed 75% of the vehicle tow rating.)
Thus with the Kia for example - at 5000Lbs gave us 3750 to play with less the 3330 trailer weight and that left us 420Lbs - hmmmmmm add in two big dogs and Peter and I guess what. No food, toys or liquids are coming on the same trip.
Now we have moved up to a 6500lb tow capacity with our limit of 4875lbs. So we are nice and comfortable - still have to watch the amound of junk we bring - but space is more of an issue there. Keep in mind when you max out your Limit - you are still 25% from the actual vehicle tow rating - so on some occaisions you can bring the extra dog or case of Canadian Ice if need be.
Nothing concrete for you but food for thought - the combo is not just the tow vehicle. And while torque, HP wheelbase are all important variables it is as equally important to look at all the other variables too.