The EK looked nice the numbers didn't turn out as good as I expected from the reviews I saw:http://www.legitreviews.com/ekwb-predator-240-aio-liquid-cpu-cooler-review_171968/5
I am using my old h105 with noctua industrial 2000 rpm fans. My 5930k is clocked at 4.5ghz and it stays cool and quiet.
K...I was am leaning towards the Corsair with Noctua fans. I dont really see myself doing a custom WC loop for now. I need something simple and quick to setup. My other PC has a Corsair H110i with Noctua 140mm on them and its excellent. Never even tried the standard Corsair fans before.
Corsair for me.