I agree w/ betting the side you like first, but my first consideration would be to take the line that is the biggest abberation. I never middle a game if I like one side strongly enough to bet. That may be vain, but I can't stand the idea of getting nothing from a bet I would have won. I have only been busted once, but, as a general rule, you're right, middleing, or any other form of arbing, for that matter, is more trouble than it is worth.