AC Stud Buyins?

[tikipirate]

Upcoming trip to AC, planing on spliting time between Taj and Trop. I'm mainly a LHE player, but might be looking to try Stud. Whats the smallest game spread (I understand some are ante and some are no ante, and would prefer ante), and what is the general rule of thumb for stud buy ins...ie X BBs so I have enough but don't look like a total noob. Thanks guys.