could you be a little less specific?
Kidding,
well there are a number, I guess it depends what you want.
Flying, or static is the first question,
then it comes down to just how much would you like to spend?
Flug Werke 190`s are now coming on line, 10 years after the project started with some teething problems but still fantastic looking machines. I would not think you would have much change from 800K + usd.
They are also tooling up to do A model P51`s, same kind of pricing though.
The ME 262 project, amazingly ambitious, but probably just too much airplane for most to take a serious interest in.
One is for sale now, at 3,000,000 usd.
There is a full scale all wood spitfire, looks great, but even from a kit a massive investment in time and no doubt cash as well.
There are options, but all depend on the level of dedication you have, as well as just how much money you want to commit to it.
I would say that no matter which replica fighter you chose, (excepting WW1 replicas) it would be far cheaper to buy an originall flying T6, T28, or even upwards of a Yak 3.
Good luck