save 35% at least, see your tax guy expecially if its high dollars.
1) pay your 35%
2) you can be dirty and not claim it hold out for 7 years, if the IRS isnt knocking on your door you are in the clear to spend that 35%.
3) renounce citizenship, move over seas, wait 1 year, then cash out.
4) there are ways to pay less than 35% that are legal, but i have no experience moving/declaring money like that. see a pro.