I used to complain about FTP's cash-out policies. Requiring $300 to get a check was just too hard a level to reach. But I've actually been getting close to $300 lately and I've come to discover that they've lowered their cash-out level down to just $100. Not only that, but they'll do an electronic bank transfer. We'll see very soon how well that works, but I'd expect the recent legislation to make it harder to get money in rather than out. But if you don't trust the electronic method, they'll mail you a check for a $100 minimum.
So now you just have to double-up. Sweet!
All in all, I have to say that $100 is a reasonable minimum. PokerStars has a $75 minimum, which is even more generous, but they also have a minimum deposit of only $10 instead of FTP's $50.