Finally got myself to lvl 30 and started the X2010 challenges - holy crap is it ever hard! I started with Suzuka as it's the track I'm most familiar with - I kept getting DQ'ed as I couldn't even keep the car on the track to begin with. The first time I made it to the finish I was about 7" off.
Anyway, I got bronze after about 2.5 hours. Going to tackle Nurb next, as seems like it'll be pretty difficult. I want to leave what I feel will be the 'easiest' one for last.
It will be an EXTREMELY gratifying experience if/when I get all bronze. I've already traded for an X2010, but haven't even used it yet. The X2010 I win here will be the one I will treasure.
Gold/Silver won't be anywhere remotely near my to-do list.