1: you dont need 16 gb of ram unless you are video editing. you can go with a set of crucial ballistix sport 8gbs
2: i have a mushkin chronos deluxe and it rocks at only around the 1$/gb mark. plus it uses the same nand as a vertex 3 max iops
3:get a gigabyte gtx 670. it is 100$ cheaper than a 680 while performing 5-8% less.
4: the silverstone case isnt compatable. i would personally go with a antec one or antec 302
5: a good power supply is a ocz zt550w. its fully modular and pretty cheap too. if you have more cash, i would definity go get a seasonic m12II 520w. 500-600 w is good enough for the single gpu. if you want to sli or crossire, get a 600-750w power supply