Bankroll Question

[michiganlaw]

I've got $500 in my Party account. What limits do you think I'm bankrolled for?

Seems like I should stick to $1/$2 limit, or the $25 NL tables. However, the $2/$4 and $50 NL tables tempt me, but I'm probably underolled.

What is the general standard for picking a limit (not accounting for skill level, just cash) - 20 buyins for NL and 300bb's for limit?

Thanks in advance.