Forza 3 for me is my favourite racing sim of all time. The way the car's feel and the AI in Forza 3 were superior to GT5 in my opinion but I always felt Forza 1&2 were never up to the quality of the previous GT games. So for me Forza 3 was the only one that challenged and surpassed the GT series.
Why does steam have to always have sales on. My credit card can not take any more punishment!!!