Doesn't the cab ban say it all? It may be partly rollover fears, but structural rigidity will be much less (hence handling on limit etc).
Surely you can wait until a coupe comes around? If necessary buy from some other part of Canada (where are you?) and enjoy a great drive home getting to know it (and buy SMG - see other posts!).
E46 M3 CS SMG: silver grey, black Nappa, 19" 'bling' wheels, loads of toys