It has to be the Ariel Atom. It may not be a Ferrari or a Bugatti, but OH MY GOD! is this a fun car and the best buy any man could ever do, I'm telling you, i can't die without ever owning one of this, and at $50,000.00 it is not a crazy dream.
If you want to see it going, take a look at this, i guarantee you you will never look at Ferrari or Bugatti the same way:
Linky