Corsair Vengeance 8GB (2x4GB) DDR3 PC3-15000C9 1866MHz Dual Channel Kit (CMZ8GX3M2A1866C9)

Anybody used this memory with Asus Maximus iv extreme MOBO ? I was thinking of getting 2 kits to make 16GB in total, any pros and cons from anyone ?

With Sandybridge setups 1600mhz is usually fine, one thing you would need to watch is the cpu cooler, as larger coolers can inter fear with the heatsinks on the RAM.

You started a thread asking about 2133MHz RAM and I advised you not to bother and I pointed out two 1600MHz 16GB kits.

1866MHz RAM will give very little extra performance with Sandy Bridge.

But if you're determined to ignore all the advice and want some 1866MHz RAM then here you go:

G.Skill RipJawsZ 16GB (4x4GB) DDR3 PC3-14900C9 1866MHz Dual/Quad Channel Kit

A bit cheaper than 2 kits of the Corsair and lower profile in case you have a big CPU cooler.

Edit:

Sorry if that sounds a bit harsh but you really only need one of the kits I linked to in your other thread.