Haha the curse of the project. I have thought something similar myself. Like why drive this old 80 when I could just get a 200. Throw a little lift, maybe some bumpers, new king shocks, and then it all just snowballs, just like I am sure your diesel Toureg will. 
Better get on it.. I've decided to sell the rig in the next few months.
It's AWESOME, and finally "done".. but this last 6500 mile trip made me realize that for the way I travel, overall I would be a lot better off with something less built. Plus it being "done" means I need a new project. Thinking a diesel touareg to travel in and toss a turbo onto the TSX?
Realistically I do have a few odds & ends to button up before it gets listed (re-resistor a toyota cruise stalk, hard-wire BCM, further tweaked oil pan, condenser fan) so you have some time but..