The behringers would have to go on their sides, which while it isn't ideal, you've got other situations that aren't ideal as well.
Since you're looking for something small and dynamic, and since they have to go on a shelf, I personally would recommend the Klipsch RB-10. It might be slightly over budget, (225 shipped) but its an exceptional performer at that price and has HUGE waf. They are very efficient for their size and are made to the strict specs of the Klipsch Reference Pedigree. My buddy has them on his entertainment center and they really surprised me for the cost and size. Obviously, they pair better with a sub, but you're not gonna find a bookshelf at your budget that won't need one down the road somewhere.