Thanks KP. The space is the big concern (for a rear facing child seat). I just don't see any car that offers what the e90 M3 does as far as practicality and performance for a DD. I could go to a coupe for looks, but I think the e90 looks 95% as good with 40% more usability.
My hesitation to the e90 is that they are being replaced with the new one. And I saw a F30 with the M Package in Estoril Blue and it looked amazing. Could only imagine what the M3 will look like.