I have a V6 - mainly because I got an amazing deal on it.
Realize, its a 5000+ lb vehicle, so you aren't going to be taking it to the drag strip any time soon.
Between V6/V8 - It truly depends. The V6 is plenty sufficient for my needs. She's hit 110mph like a dream with lots of room to spare.
I know Trent hit 130 in his V8. I know most V8 owners love their TRegs.
I also know that most V6 owners said they were glad they saved the money because the power was sufficient for them.
Not only is it a slight gas mileage increase, for me, it was about an 8k upgrade to get to V8 price range.
Drive them both. Try them in [D]rive and in port.
Keep us informed on what you decide. We'd love to have you as an active Club Toaureg member!