If it were one car only, then I would have to say a Ferrari F430TT.

Multiple cars and it would be:
'95 SC300 2jzgte built to 900+whp - 60k
'09 Corvette ZR1 -120k
'05 WRX STi built to a reliable 400awhp-30k (dd)
'92 Prelude Si w/built h22a and turbo setup making 400-600whp - 20k
'08 s550 on 22's color matched - 70k