The 135i is on spazflats at the moment - there'll not be much left of them when I'm done hopefully!!
Usually run Dunlop DZ03G or Michelin Pilot Sport Cup, I prefer the latter, but they're not easy to come by. The Federals are by all accounts an excellent buy and an official tyre in a few race series, Kumho V70A, Yoko A048s and Hankook RS2s are all very good too.
See what you can find, all the above will serve you very well indeed.