Just have to say this, I've had a lot of fun and mileage out of F3 with a gamepad. But recently I bought a Fanatec CSR and it's fricken ACE. Not quite as good as GT5 with a G25 in many FFB areas, but a smeg load better than a pad and still awesome.
Funny thing is I'd actually been a bit disheartened with my testing, desperately trying to find settings that I liked and found none. Then I realised I was turning on my XB with the guide button on the wheel.... the manual specifically states not to do this and I'd forgotten. So making sure I turn the XB on first THEN press the guide button on the wheel I've been merrily burning rubber.
GT6 will have to be mind bendingly awesome for me to even remotely consider it now. Forza 4 may be a birthday pressie now (June)