There are 4 wheels available from Logitech, which are:
These are for PC/Mac use, there are several others for PS2, Xbox and Gamecube.
I like the Momo Racing, probably even more so than the MOMO Force because it has a stick shift, which i always prefer above the paddles behind a wheel...
Hell, i would even be willing to switch my MOMO Force with a MOMO Racing!