chumba, to quote our American cousins "there ain't no substitute for cubic inches". Go for the big'un.
Hi chumba,
I,ve owned and towed a 2.5 tonne trailer with both a 2.7 swb and a 3.0 auto lwb for my work.
Both got to 100,000 miles with no major faults and no breakdowns.
Items that needed replacing were the front anti-roll bar drop links at 90k and exhaust back boxes ,apart from that nothing, just routine servicing.
The 3.0 being auto and lwb was about 2mpg worse at 23mpg when towing and hardly any quicker.
Also had a 03 Navara , similar economy and power but poor rear leg room
Lastly a 3.2 swb auto Shogun, which was the only vehicle that let me down {only once in 50k though}.
With the Shogun because of the monocoque design you get more noise through the towbar as apposed to the older 4x4 with the body mounted on rubber and a separate chassis.
The Shogun engine noise in the cabin is unacceptably noisy in my opinion.
Terrano in either guise is brilliant value for money and wins for me hands down. Lack of cruise control was my only gripe.