He's buying the retail version of Windows 7, hence for the high price. You can buy an OEM version which will work exactly the same pretty much but it will cost about half the price.
You need a more balanced system. For example you have an i7 3770K paired with a cheap B75 board and 16GB of RAM. Not really a great combination.
I would suggest you make the following changes:
Drop the 3770K and the B75 board (both of which are outdated now) and instead get an i5 4670K and a good Z87 board such as the Gigabyte GA-Z87X-UD4H. The i5 is pretty much the perfect gaming CPU right now and with a good cooler you'll be able to overclock it really nicely with that board to get extra performance.
RAM, drop the 16GB and go for 8GB (2x4GB) G.Skill RipJaws-X 1600MHz or 1866MHz. No need for 16GB.
SSD, I've used and recommend SanDisk, Samsung, Crucial and OCZ drives. I have the OCZ Vertex 4 128GB and I love it. Go for 256GB if you can.
You might a large 1TB or 2TB HDD for storing stuff on too, you want 7200 RPM and a 32MB or 64MB cache buffer. Seagate and Western Digital make good drives.
I wouldn't get the Antec 1100. Old case. The NZXT Phantom and Fractal Design Define XL are better cases for the same kind of money. Also check out some of Corsair's cases.
Up the power supply or 600W or 650W. The Corsair TX 650 V2 is a good unit.
Rest is looking fine but maybe with the money you've saved, get a GTX 770 instead of a 760 because that will make a bigger difference in games than most things.