Hey there, just a couple of questions first
-what resolution of monitor do you have?
-have you thought about buying the components yourself and letting someone to build it?
-Are you planning to overclock the cpu?
Right now just from looking over it, I suggest you switching the 2600k to a 2500k, which saves you a 100 dollars, and then use that money to upgrade your 550ti selected to a 560ti 1gb
If you are not planning to overclock the cpu, a liquid cooling kit is probably unnecessary and causes more trouble, but then they dont have a good selection of air heatsinks