Hmmm, kinda funny you guys all picked the grandstand sections. My first pick was the Corner 7 Terrace. I figure I'll have easier access to pits and easier access to move around to different corners during race/practice. The Grandstand seating is better for the 500, but I think the infield stuff was better for F1 and will be for MotoGP as well. The lone exception will be the grandstand seats near Start/Finish, as you'll get to see all the pre-race hoopla from there, which is kinda fun.
Don't worry, IMS will have no trouble handling the Moto GP crowd. This will be a small event for them, unless all the foreigners show up.
Looking forward to it!! Corner 7 Terrace, Sec 2, Row DD