Agree with above - the V6 is the king on the sand without a doubt.
But using it for carting tools / building materials around 6 days a week - gimme the diesel Mr. Toyota
I think that the new model will deffinately have at least a 6cyl diesel option as the current d4d was great in 2005 when it came out, and blew everyone away at the time - things have changed - the competition has stepped their running gear and drive trains now its toyotas turn to go to the next level again and get back on top.
The current 5speed box dates back to the toyota surf released in the 1990's and all theyve done is strengthen the output shaft and gears and it barely can come with a standard D4d....