I love seeing the Nurburgring modelled! It looks great! I only wish it had been a long shot instead of a close-up when you went through the Karusel. And the Schwalbenschwantz.
I still have my copy of Grand Prix 2 (and the original Grand Prix, but it's pretty bad) and I love those tracks. Most newer GP sims are only for consoles, and I can't afford to buy one right now.
Great stuff.