Asus LE boards offer poor power phases, they are not fit for an unlocked processor to overclock. If you like Asus much you can get the vanilla p8p67 or higher for your needs but i still don't see the reason since you can get the Asrock z68 extreme3 gen3 for less money for more features and 8+2 phases.
While the hydro cooling is fun it is also costly. The Corsair A70 will cost you much less and the performance is going to be more or less the same. Just make sure you are getting the low profile memory.
Speaking of memory, there is no need for 1866mhz. The difference between 1600 and 1866mhz cannot be felt.
If you are going to use this build for gaming then use the saved money to get a 570 gfx card.