The truck one already has is usually the best choice from a financial point of view, assuming it's capable of doing the job. Yours is certainly more than capable! You may want something like an Airsafe hitch for a smaller trailer like that with a big beast of a tow vehicle, but an Airsafe is a lot cheaper than the depreciation on a new truck.
Il Carriaggio — 1975 Argosy 24 | Il Progetto — 1976 Argosy 28 Center Bath | WBCCI# 15566
He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill