Hmmm...
Z4 M Coupe in Ruby Black with brown extended leather
Z3 or Z4 Roadster, maybe keep what I have and supercharge it
993 Carrera S or Targa in Arena Red
C63 AMG wagon/estate in any colour but not black or silver. Mercedes dog guard and shopping bag hooks
F430 in Ferrari (whatever they call it) red with cream hide.
New Mini Cooper S with lots of options, BRG or white with black stripes/roof.
Mazdaspeed 3 just because these things are nuts! (silver, with 1.6 badges and more discreet wheels, probably from the sport model which look a little like Focus ST wheels)
Suzuki RG500 in Red and Black
Yamaha R1 from a year or so ago in the yellow and black (80s) paint scheme
Couple of dirt bikes, 2 stroke and 4 stroke, road legalised.
Yamaha Banshee with a proper 60hp RD350 motor installed
Trailer for the bikes when I cant be arsed to ride them to the off road areas. Scratch that, change it to a little RV, 4 berth, with a workshop/small room at the back for the bikes. I am thinking something like a Hymer rather than a US sized Winnebago.
Assuming I havent spent all the money yet, then, a few more cars (in order of preference)...
C6 Z06
Mitsubishi Evo VIII
NSX
BMW E30 M3
BMW E28 528i
Mercedes 190 2.5-16
Triumph Dolomite Sprint
Ford Fiesta RS Turbo
and as per Arman I would achieve this list by setting up a small but exclusive supercar/sportscar dealership, specialising in sourcing cars for clients.
So I'd hope to get most of the cars at trade price and turn the million into much greater $ along the way through business.