Choose a good three car garage, they can be new or used. Only requirement is that all of them have to be 4 door sedans.
BMW M760 Li: Big comfy Luxo barge with a 600 V12, yes please. I think this would be one hell of a DD Info
Holden HSV GTS-R W1: LS9 engine with a proper manual trans and a LSD for the track and the back road Info
WRX STi tS type RA, for winter/gravel/dirt use. Would probably also give it some more power, possible even lift it a bit. Info
I could have added more classics but I think these three would make a hell of a combo