I like the bio fins better than the scubapro, as the scubapro are much wider, and have a tendency of bumping each other as I swim. In every test I've found, or done myself, the bio's are the top winner for speed in both flutter and frog kick, and the most efficient based on air consumption against all other splits, and paddle fins.
True, they may not be great for backing up, but I really don't care, as I spend my time going forward... for the once in a great while I might need to back up, I'll live with it for the ease of diving throught the rest of the time.
Yes, I like bio fins, I don't dive with a back plate, and I don't have any hoses wrapped around my neck. Can I still be part of the club?? At least I don't dive a HUB.