If you're going to ask for an expensive trip, I'd suggest going to a really cool track....like Spa or Magny-Cours or The Ring or Hockenheim or something. Plus, it gives you an excuse to do some European traveling.
In fact, if you want to plan it out, I'm 99% sure I'll be in Europe around July 6th (Magny-Cours) and I'm thinking of renting a car in Paris and driving to the track. Tickets aren't too bad, either.
I'm not sure what your plans are, but here's a link to the page for ticket prices:
tix
PM me if you're thinking about it. I'm pretty sure I'd only go on race day....unless you're going, then I'd go to practice and such (I'm just not sure if my other friends will be interested, but if you're going....)
Eric