Unless you are absolutely sure of the integrity of the teacher/club, I'd say go for one of the styles that have been popular in the West for a long time and are more established, like Judo. This is because they've had more time to weed out the pretenders and wannabes, of which there are a lot in the MA world. Not trying to bash any style here, but the newer (in Western terms) or more exotic styles generally has a higher percentage of people who talk a lot of shit but don't know much, because fewer people know what to expect from them.