He keeps insisting SOP for Canada E46 M3 in Jan. Anyways I sat in a 325 coupe with sunroof for a bit and found even with the seat lowered all the way down, head room was marginal. Better than 97 and up Preludes which I had to pass on for the same reason, but still close. In short, I definately will be trying to do what I can to get one without a sunroof.
The seats in the 325 were the manual seats. I've not tried the power seats... some people say they can go lower, others have said the opposite.