Thought about this....
Bad points... Not 5 door and doesn't handle great, still looks good and goes tho
E46 M3 doesn't handle well????????????
I've had a E46 M3 when my boy was born upto when he was 12 months old, which was the most difficult time as they are in car seats that need to be put in and out of the car, and it was absolutely fine. If your kid is over 12 months then they should be in the bigger car seats that sit in your car permanently which makes things even easier. In fact in some cars, its easier to get your kid into the car seat from the front e.g like you have to with a 3 door car, than it is in a 5 door car where they access it from the side.
E46 M3 would be a no brainer for me, plus you can get a half decent one for way less than £10k........
The 'rasp' was the only thing I didn't like, but it wouldn't put me off buying another....