After all the random tax business and debts paid,

1) Get 311 to play my birthday party. I'd do it as a charity concert where I would cover all the costs of setting up the show and all the proceeds from tickets and beer sales go to charity. I would give them a setlist I picked out and it would be the best 311 concert of all time.

2) Sick house. Huge garage. Man-cave in basement with a full bar, music room, movie theater/game room with every console, etc.
3) 911 GT1, Audi RS5 with a manual swap, probably at least one 911 from each generation of the car, a 914-6, probably others.
4) Spend at least a year traveling the world.