depends what you want from the game. Easy money at the moment is in 2-7 triple draw as very few really play it well (or atleast not the large valumes of people that play HE/STUD and Omaha well) so it's easier to make some money from it.
Pot limit omaha and Omaha 8 or better is great fun though and you'll always find a game at a decent casino and online going (where as with 2-7 triple draw even Stars sometimes doesn't have a table going).
Omaha and O8 would be my choice if I were you..plenty of action and loads of terrible players everywhere. It's also a game that is to be found in every cardroom as part of the dealers choice (Dealers choice is ussually actually mainly 6 card omaha
)
Many benefits from learning a new game and it's also great fun to play something else sometimes
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