I've got this on the Xbox and Pc, and it's a great rally game. The Xbox version controls a little better, but the Pc version allows for online play which is nice because there are so few good online racing games around.
The other nice thing about playing on the computer is using a USB wheel. I've got my Logitech that I bought for GT3 that I've hardly used. I need to get into PC racing games ... but a new video card comes first.