I used Bodog.com and never had any problems depositing or withdrawing money. Now it's bovada.lv. I assume nothing has changed as far as that stuff goes, but I'd look into it if I was you.
Bodog... er.. Bovada usually gets its lines up a little later than the other main sites and has more juice on fights with big favorites, but they have top notch customer service and toss up some weird odds on props. If you're just planning on throwing some extra cash down on some MMA fights to make them more interesting I'd say go ahead.