New to limit, Advice Needed

[BlackjackAJ]

I'm an experienced NL player who decided to take a shot at limit. I kinda feel like the SSNL games are turning into nut-peddling contests. So I deposited 300 dollars to play the Party .50/1 and have done very well. Over 5K hands I've averaged 8.45 BB/100 and my bankroll is just shy of $700. I know I can move up to 1/2 at this point, but was thinking that I might want 500BB at 1/2 before I move up. Anyone else prefer a larger than standard bankroll for your given level?