How big of a truck?
Ok I know this isen't the answer you were looking for but more in the line of advise..The biggest(payload) most powerful one you can afford! Ok now to explain myself, I have seen a trend you have a truck so you buy a trailer, the truck seems under powered or the trailer is near the trucks max load capacity, so you go buy a new truck to pull this current trailer, your tow package is just great,then in a few years you see a different trailer That really fits the bill so you buy it, but now your truck seems a little under powered to pull this new trailer so you go truck shopping...again or maybe you have decided to trade that tt for a 5th wheel and find out about tongue weight/axle weight limits.
:laugh: Now I don't know you so I don't know if this applies to you, but I have seen this senero played out several times I hope in someway this helps