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So we're starting to think maybe we could play a little higher than the usual $5-10 and still be comfortable and hopefully make some cash on our weekend getaway (assuming we nix some of the wasted playing time of course).
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You're correct that a given limit is much softer live, e.g. you would probably crush the Taj $5/10* game long-term. But you may not be prepared for the fact that B&M gives you many fewer hands than online, especially if you multitable. Therefore, variance over the course of a weekend could easily leave you -100 BB or +200 BB.
That said, I'm sure you'd have the best of it in a $10/20 and maybe $20/40 game; just be prepared for this kind of swing, because you're getting a much smaller sample in a given time period live.
Just in case it's helpful:
http://poker.wikicities.com/wiki/Atlantic_City
*I don't play that high, but i'm sure it's softer than any online 5/10 except maybe Pacific.