"Needs to be as small as possible" *chooses a Prodigy*
oh lol - you are aware of how massive the Prodigy is, aren't you? Gorgeous case but it's not small. The Silverstone Temjin TJ08 is the same and Micro ATX!
If you want small as possible, you could get that spec into an Elite 120, or even a Sugo SG05-450 with a little creative shuffling.
The spec is good though. If you stick with the Prodigy, then you might as well make use of it and get a Corsair H100 to cool the CPU and really crank the overclock. Fortunately the CPU socket on that Asus Deluxe board is right in the centre of the board so air coolers shouldn't be a problem, but I'd still go for a 240mm AIO water.