well on the PC there are a few simulation type racers, but unless your really into all the intricacies of setting up a race car etc then they can get boring
toca race driver series.... isnt a bad effort
colin mcrea rally 2005 isnt bad either, but its just continuous racing agains the clock, gets very monotonous...
richard burns rally.....well thats a real challenge lol.
best racers, IMO are on the console....so much fun can be had with multiplayer burnout
