I already have my BRZ, so I guess I'd either go with a 1972 DeTomaso Pantera or a second BRZ to turn into a race car.
Or, far more likely, I'd buy a nice, large, quiet piece of land here on Vancouver Island. Something near the coast, still within easy reach of downtown Victoria. I'd build a custom moderately modern house; nothing too big, I don't need much living space. And then I'd build a serpentine 40 miles long 'driveway' on my property so I can have some fun in my BRZ without having to worry about tickets or other people. THAT is my dream.