Sorento Towbar choice

Nuggy

I am considering buying a Sorento in the very near furure, went for a test drive of a KX2 yesterday. I will then have to decide which type of tow bar to have fitted, Swan neck fixed or detachable, or fixed tow bar with bolted flanged ball. Does the under slung spare wheel affect the decision? I intend to have twin sockets, not the 13 pin plug and realise I couldn't have a bumper protection plate on a Swan neck. Thanks, Nuggy.