Stay away from rFactor if you want to have a life! I turned up the graphics to their highest setting, and they are gorgeous. From what I gather so far, you start off in the kiddie circuit and have to prove yourself in order to get car improvements and advance to higher ranked races. This is a racing sim, so the physics are realistic. This isn’t Need for Speed or GT4, so be careful through the turns.
rFactor seems quite a steal at $39.99. I’ll try some online racing once I can get around the track once without spinning out into a wall.