Hey there, you could definately go with the 212 Evo, it is an excellent cooler for an even better price. One thing you should note though is that it is not the best in class. If you're willing to pay a little extra get a Noctua NH-D14. The Noctua runs about 6 degrees celsius cooler than the 212 Evo which I feel is quite substantial see as Ivy Bridge runs pretty hot as it is. Adding an extra fan to an Evo 212 makes minimal difference and increases the price by $15.
I feel that you should avoid all-in-one liquid cooling solutions; they don't provide for very much air flow around the voltage regulator modules which is especially important when overclocking.
Sources:
http://www.tomshardware.com/reviews/LGA-2011-i7-3960X-Air-Overclocking,3130.html
http://www.overclock.net/t/1199135/hyper-212-testing-push-vs-pull-vs-push-pull-also-horizontal-vs-vertical-positioning