You have account already, going to mainpage and either buying S2 by using credit card or inserting voucher code will just update your account status to fully licensed and you're ready to go.
1) Momo does have paddles as well as sequential
2) The mounting for the Momo is pretty much one of the better ones, the Madcatz wheel I had, the mounting was about as strong as Lindsay Lohan
3) You might have a point on colour, but my Black + Aluminium G25 doesn't quite fit in with my Acrylic White iMac... Ooh, new excuse to buy new iMac...
my comp is not that bad i have hi res stuff but when i download high res pack at database it becomes unplayable its not bad i can play besides im gettin a new graphics card my comp was like 1,200 dollars in its time
If you like the demo, you should definitely buy S2. A steering wheel is a 'must have' anyway, so it's up to you whether you want to get it before or after the license. But waiting for S3 would be like hopelessly waiting for christmas 2010, not caring about any of the christmases before it - stupid.
u should deffinatly buy S2, but its a hard desicion because ur social life will end at the time u press the validation link so... BUY S2 (ur live sux anyway:tilt