i did buy this game. it's fun but tough. as soon as you try to disable the assists like braking or lower traction control, you're dead.
i really want the logitech g27 wheel. it's the king of wheels but at $299 msrp but it can be had for $220-240 on amazon. there was a thread a few months ago on slickdeals where Best Buy had it for $150.
the driving force gt is supposed to be good, it's $150 msrp and a bunch of sites have it refurb for about $60-80. the downside here is no paddle shifters, no clutch pedal, and the shifter is only sequential.