I have 3 and they are for purely personal reasons:
The original Silk Cut Jag
The "circuit board" Mercedes
#19 Shell Porsche
All are from the 1988 LeMans, the one time I got to attend.
Why? The Jag because it's the winner; the Merc because they all withdrew (tire problem, I think); the Porsche because the Andretti's drove it and I got to meet them all together in the paddock.
As far as performance, I've had the best luck with the Porsches for best, all around drivability.