It is a very nice build with some hibh quality parts and if I may ask you what is your main purpose for this computer. While everybody likes the idea of massive amounts of ram , for gaming you won't need more than 8gb. I felt the same way untill one day I had the resource monitor up on the second screen while gaming and saw that of the 24gb of ram I had I was only using 5gb and that was with the second monitor up with things open there.
So while ultimately it will be your choice on how much ram to get unless your doing video editing or graphic design work you won't use half of that 16gb.
The Asus Sabertooth is a nice board for sure but expensive so if you were looking to save money you could go with a less expensive board but again it's your money and if that's what you want regardless of price then it is a good board and has a lot of features and is a great choice.
I think you are planning to overclock based on the cpu cooler you have listed but the Ivy Bridge does not overclock as high as the Sandy Bridge and has a lower TDP of 77w compared to 95w for the Sandy Bridge. So that cpu cooler is overkill and once again if it's something you want barring cost then it's a great cooler and should work well for you.
Overclocking Ivy Bridge article.http://www.tomshardware.com/reviews/ivy-bridge-overclocking-core-i7-3770k,3198.html