The parts I compiled are:
Case: Cooler mMaster HAF X --- Good :D
Motherboard: Asrock Z77 Extreme4, 1155, 4x DDR3, 4x SATA-300, 4x SATA-600
Processor: Intel Core i5 2500k -- On the motherboard/CPU combo you might want to look into getting a haswell (i5 4XXX) as well (huehuehue) as a z87 base motherboard, it isn't gonna do much for performance but it's not gonna cost much more.
Cooler: NZXT Havik 140 -- I don't know much about coolers
RAM: Corsair Vengeance LP 16GB (two 8GB ones) -- 16 is good, 8 would be plenty tho, if you need budget to get Haswell, cut down to 8GB of RAM
SSD: Kingston HyperX 3K 240GB -- SSD's be nice!!
Hard Drive: Samsung Spinpoint F3 HD103SJ 1TB -- I never worked with Samsung HDDs, and Seagate seems to be cheaper, might wanna look into getting Seagate/Western Digital
Power Supply: Corsair AX860 80 Plus platinum certified -- You could step down to anything over 600W with regular 80+ certification to save some money
Soundcard: Asus Xonar Essence STX -- :D
GPU: Sapphire HD 7950 Boost 3GB GDDR5 -- One of the best $/performance ratios, you might want to compare benchmarks between this one and the GTX 760, just search for benchmarks for both cards on Youtube/Google and compare them (make sure games are ran at same settings/resolution)
I'm correcting stuff just to correct stuff, the build you have going on is very solid, and those are my very own opinions, how I would do it if it was me.