Have a look at the resale values of V6 vs TDV6. The extra cost of the TDV6 can be recooped in the increased resale price. A number of mags have done this exercise recently. New, TDV6 is better buying.
Second hand a V6 is better buying.
I went TDV6 for safety in the desert as I don't like petrol refuelling from jerries in the middle of no-where.
Someone will disagree, but this my personal view.

