Cars:
Lotus Super Seven.
E-type Jag.
HummVee
1978 MGB GT... oh lookie, I've already got one of those!
(The remaining 6 would also be 1978 MGB GT's... but only for use as spare parts.
)
Bikes:
1998 CBR900RR in Pearl Siren Blue... oh lookie, got one of them too (for the moment
)
2007 Triumph Speed Triple
(The remaining 8 would also be Speed Triples - again, for use as parts!
)
EDIT: Now what would be your fantasy mix if it was just 10... regardless of car or bike?
(... and no, just cos it's only got two wheels you can't have 2-bikes = 1-car.
)
Mine would stay the same, I'd just have to cut down on teh number of spares.