Hands down, BEYC IMO. Food is great, you can hang at the beach and Happy Hour (starts at 3PM) is very fun. The bartender Saturn will keep you entertained and well liquored up.
If you wanted to check out Saba too you just have to inquire about the ferry bringing you over. BEYC and Saba, while they don't share ferries, they do shuttle people between the two when they have enough guests. I am not a fan of the new Saba but can appreciate the rebuild and understand the desire to check it out.