I bought a 16gb kit of vengeance about a month ago.
Great ram, I got 2166mhx out of them... (Z68-UD7-B3 mobo, I7 2600K)
The only problem i had was the compatibility for aftermarket coolers!
I have tried heaps of coolers in the hope i could have kept the vengeance kit
but i couldnt find any decent coolers that are compatible. I found only two coolers that were decent and able to fit with those huge heatsinks.
-Prolimatech Armageddon, with xigmatek 120mm fans.
-Noctua NH-U12P, right side fan has to be rased a little but it fits.
- Corsair H70\\50, fits fine of course but i would not recommend the H series coolers to anyone (better out there for the money!)
-Corsair are bringing out their new H series water coolers which look like they are designd much better!!! and yes they will be compatible with the vengeance ram modules.
So to cut a long story short, I sent back the vengeance kit and bought a 16gb kit of Gskill Ripjaw x. The Gskill x kit is compatible with all aftermarket coolers.