One thing to keep in mind with an X79 platform is you need a pretty big budget to do it justice.
You could get just the MB and CPU and throw a $30.00 air cooler on it, but that's not what it's meant for.
The X79 is an enthusiast platform and really deserves to be WCed and OCed.
I recently started out with a $1000 budget and it doubled. Then I found an "open box" Asus RIVE and couldn't resist. Now my budget has tripled.
I did do a lot of research before planning my "z77" build, but I just couldn't resist how BA the RIVE looked so now I'm in too deep to go backwards.
Not that I regret my purchase at all(because it's going to awesome when I'm done), but if you are going to go with the X79, plan ahead and be prepared to spend, spend, spend...