In my case, it's the other way around. When I started playing GT2 on the PSone, I immediatly bought a Ferrari wheel. It wasn't compatible with GT2 but I managed. I never used a controler.
I still regret that games like motorstorm 1&2 aren't compatible with a wheel. I didn't buy this game because I had to use a sixaxis to play this game. For me personal, it's just not the same as playing with a wheel, although playing motorstorm with the sixaxis was fun from time to time.
(the motorstorm game I had came with the PS3 I bought, just to explain how I got motorstorm although I just said that I didn't buy this game. I sold motorstorm after a while).
Maybe you can add a poll to the thread?