I play Pot Limit Omaha on Poker Stars with blinds (.10 and .25 blinds). I normally buy in for $15-25. I've heard people say you need a bigger bankroll in Omaha than in Hold Em' because of the big swings. What is an adequate bankroll for this level in order to handle the swings.

(i'm sure this has been discussed, but as usually wasn't able to find much with a search.)