circuit, I urge you to drop everything & do so immediately. Here:
http://www.racesimcentral.net/
It's a fantasy track, most of which I have no use for (they're always
somebody else's fantasy of a track, not mine), but it seems oh so real.
There are soaring elevation changes, *** straights, difficult approaches,
subtle cambers, asymetrical radii, deceptive apexes, and soul-satisfying
"blasts" (as Derek Daly calls 'em). Best of all, the surface isn't
billard-table smooth like most add-on tracks. The suspension is in constant
motion, as you can clearly see in the replays, which forces you to make some
interesting setup changes. Lap times are lengthy (around two-and-a-half
minutes in a Cup car) and it's perfect for online racing.
The only downside: it's a frame-rate killer. It runs okay on my 1.3
Athlon/ATI 9500 Pro...but only just. It would take something twice as fast
to do it justice.