p.s. if you see any other problems please point them out. thanks again.
Your case doesn't have accommodations for DIY liquid cooling (you need, optimally 2x120 or more openings with tubing cutouts). The BEST you can do is going with a closed liquid cooler, but then you'd have to settle for a 1x120mm cooler like the Corsair H80 and below, and CAN'T use a H100.
Also, your video card is needlessly expensive for what it does... You should consider a single HD7970 Ghz edition or a GTX 680. The HD6990 was fast in its day, when the game properly supported and scaled well in CrossFire. With a single HD7970 or GTX 680, you are fast in any game, regardless of scaling, plus, they are a generation newer.
Your PSU for the money can be switched to something better, ANYTHING Corsair, especially the enthusiast series is a good choice. Thermaltake has questionable quality on their PSUs due to their tendency to cut corners on all but their top wattage models, and their inconsistent quality history.
You will get more responses if you describe the parts with a link in your post.
Here are my thoughts:
1) To answer your question, please don't bother with liquid cooling, particularly as a first time builder. Liquid coolers are expensive, loud, less reliable, and they do not cool any better than a good air cooler in a decent case. I am not familiar with your case, but the specs looks good. You should have no problem with using an air cooler.
The hyper212 you selected is OK, If you want the best, for quiet, or cooling, then
I would suggest a noctua NH-d14 cooler or a phanteks. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
3) Nothing wrong with a 3570K. But few games use more than 2-3 cores, so a 3570K @$100 less would perform just as well.
4) A build with your budget demands a SSD. Buy at least a 120gb ssd. That will hold the os and a handful of games. If you buy a 180gb or 240gb ssd, you may not need a hard drive at all.
Samsung and Intel are the most reliable SSD choices today.
5) The sabretooth motherboard is ok, but overpriced, mostly for the design. Most any Z77 based motherboard around $150 will do the job just as well.
6) The ddr3-1333 ram is fine, but 1600 ram costs no more.
Ram is sold in kits for a reason.
Ram from the same vendor and part number can be made up of differing manufacturing components over time.
Some motherboards can be very sensitive to this.
That is why ram vendors will not support ram that is not bought in one kit.
Although, I think the problem has lessened with the newer Intel chipsets. Still,
it is safer to get what you need in one kit of 2 x 4gb.
And... buy low profile ram. It will avoid any coolerance issues and costs no more. The G.skil ares series is an example.