congrats dude, space grey ftw!!
black out the 335i rear badge while you're at it :-)
I think the max you can go without rubbing (depending on the offset of your wheels) is 265. As for the exhaust, grab a PE if one ever goes up for sale here... definitely worth it.
'09 335i /i\ ZSP /|\ CA /i\ Piano Trim /|\ BMW PE /i\ AG M359