Thinking about building a computer. Need advice!

[Opportunity231]

So it's that time again to get a new computer, however, i really want to try and build my own because of how much money i can save. I haven't ever built my own computer, but i did watch Newegg's tutorial on doing it and it doesn't look too bad. Anyway, i was wondering if the components i chose will run WoW and SC2 at high/ultra settings with a good FPS. Here are my parts:

Case: COOLER MASTER Storm Stryker SGC-5000W-KWN1 Black and White Steel ATX Full Tower Computer Case

Hard Drive: Seagate Barracuda ST31000524AS 1TB 7200 RPM RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive

PSU: EVGA SuperNOVA NEX750B BRONZE 120-PB-0750-KR 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Modular Power Supply

Ram: Kingston HyperX 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model KHX1600C9D3K2/8GX

Mobo: MSI Z77A-GD65 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard with UEFI BIOS

CPU: Intel Core i5-3570 Ivy Bridge 3.4GHz (3.8GHz Turbo Boost) LGA 1155 77W Quad-Core *(Not planning on overclocking)

Graphics Card: SAPPHIRE 100351SR Radeon HD 7970 3GB 384-bit GDDR5 PCI Express 3.0 x16 HDCP

Optical: ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner - Bulk - OEM

OS: Windows 7

I have a few extra questions too.
Are all of these parts compatible? I checked and i don't think anything doesn't match, but i just want to make sure.
Is there anything i can change that would be better? (my budget is $1,400).
How difficult was it for you to build a computer and any advice on how to avoid issues that you may have ran into?

Thanks in advanced!

[BicycleMafioso]

This post got caught in the spam filter (sorry), so I approved it - but since you had time to post another topic, I'm locking this one, in favour of this one.