If I had unlimited money to buy 5 cars, these are the 5 I'd get:
1) Nissan GT-R
Best bang-for-buck car in existence.
2) HSV GTS
I'm a Holden fan, and I'm 30 years too late for a Brock Special.
3) FPV F6
I may prefer Holdens, but this thing is a beast.
4) Lotus Exige
An Elise with a hard top and a bit more oomph. I like big and powerful, but I also like the opposite approach of light and nimble.
5) Toyota 86 GTS
This thing has really grown on me after I initially couldn't understand the fuss. A car designed to be as fun as possible as cheaply as possible. Has repalced the WR-X STi on my list.