I have a deposit down already for a 135i. I have no idea what it's going to wind up costing me, but I want to have my daughter driving the 'ti between work & home, and school & home. Other than that, I'll still use the 'ti for autox and track events (and on weekends). The 135i will slowly become the autox and track car, once my daughter gets a bit older.
She's got a permit now and has been learning to drive on the 'ti. My wife and I won't let her drive the slushie audi we have, until she masters the 3rd petal.
She's doing great so far.
I almost can't wait to get rid of my e90 330i right now, in anticipation of the 135i. I only wish they had a sunroof delete option for those of us in the US.