Tow vehicle comments would be appreciated

Hello All, I need some input from you on tow vehicle for a 16 foot pop top. We currently tow it with a V6 3 Litre Camry Altise. It does the job Ok, but worries me a bit because we are sort of up at the top end of its towing ability. ( We didn't think ahead, bought the car, and later our first van.)
I am interested in buying a current model Mazda BT 50, freestyle cab, 4x2 which has a 3 Litre intercooled Turbo & the common rail injection fuel system. Such a vehicle would be better for towing & I could use it also for my work. That way my wife would still be happy as she could still have "her" car & I would no longer be forced to drive it when we go away, van or no van!!

Its not uncommon to read posts on this forum concerning damage to diesel fuel pumps & injection systems due mainly it seems to fuel contamination. Not having owned a diesel before, it "frightens" me a bit. ( the cost of repair etc) It even got a bit worse a few days ago reading posts on the common rail injection system and the increased potential for problems caused by contamination in the common rail system.

We are not gung ho on buying new, so your comments would be appreciated on whether we would we be better off to buy a late model intercooled turbo diesel which does not have the common rail system. Or would we be better of to stick with petrol, maybe a Falcon ute.