well it's rear wheel drive so keep that in mid (you do live in Toronto)
I've heard that the 7 series have problems. Do you research call dealers and ask, and read post and threads on how the service is. You wan't to buy a car that's going to be a problem.
2008 M3 Sedan + catless + Tune
2012 CLS63 AMG
2014 M6 Coupe + catless + KW V3
2015 Porsche GT3