1) For a first build, I strongly suggest you avoid a liquid cooled system.
. There is always some risk involved with liquid.
. It is much more expensive than a decent air cooler. What do you get for an extra $200? not much.
. A good air cooler will cool just as well. I suggest the prolimatech megahalems: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
2) Use the savings to get a good monitor, preferably two. Plan on gaming at 1920x 1200.
3) Use the savings to get a SSD for the OS and some apps.
4) Parts look good.
5) Before you order, or, at least before you build, download and read cover to cover the manuals for the motherboard and case.
I agree with geofelt about getting an air cooler. A CM Hyper 212+ should take the i5-750 to 4GHz easily. On that note, get the i5-760 instead; it's just a few bucks more.
Your RAM is overkill, 4GB should be enough, and unless you're planning on heavy OCing, you don't wanna spend extra on the Dominator series. You can find CL6 1600MHz 4GB sets for ~$100.
Otherwise, good choices.