Best Liquid cooling 990x extreme

how much are you looking to spend?
here is a few of my reccomendations
http://www.newegg.ca/Product/Product.aspx?Item=N82E1683...
http://www.newegg.ca/Product/Product.aspx?Item=N82E1683...
http://www.newegg.ca/Product/Product.aspx?Item=N82E1683...

best of those being the NH-D14, anything past that you'd probably have to get into custom water cooling, which is pricey

edit:how did i completely miss the watercooling part... sorry bout that  

the sticky has some nice options for a cpu loop

You got that 990x pretty cheap or something? Why not go for the 3rd gen Core i7 Sandy/Ivy instead?

Budget?

Yes, one of my friends had a 990x sitting in his shop and It was gonna cost me less than a i7 3820 sandy. Also I hear the 3rd gen sandyE really is not a noticable change.

Which like it or not leaves me with more cash in my pocket for cooling and other accessories.

No budget, just looking for efficiency.

Overclocking? What speeds? Cooling anything else?

Well I'm still new to the 990x so I haven't overclocked it yet but Im can say within the range of 4.2 to 4.8@max. Soon I will install pumpkit w/radiator. Im currently using a GTX680 which by next paycheck will be getting its twin brother and I was thinking on investing a Koolance VID-NX680 Water Block.

So, assuming you've read the sticky, what questions do you have?