Is my new PC build good?

I'm just copying and pasting the important parts. This is the first time I'm making my own custom build (using CyberPowerPC. Don't want to try building it by hand :P), so I thought I might ask a question about it.

I'm going to be doing a lot of gaming AND video editing with this build. I wanted to know if my build is balanced. Is there any part that is too overkill or underkill compared with the other parts? I know it's strong enough to be able to handle games and software, but I need to know if there's a part that won't need an upgrade for a while or if there's a part that will need an upgrade soon.

• CPU: AMD FX-8320 3.50 GHz [Looks like based on everyone's comment, I should have gotten either a better AMD CPU or an Intel CPU. I'll definitely go with Intel next time :)]
• VIDEO: AMD Radeon R9 280X 3GB GDDR5 [$150 instant rebate = only around $30 to upgrade from a 270X. So I figured, why not?]
• MEMORY: 16GB (8GBx2) DDR3/1866MHz Dual Channel Memory (ADATA XPG V2) [Originally went for 8 GB, then realized it might not be enough for rendering multiple videos from multiple programs simultaneously. Also, free upgrade from 1600 MHz :)]
• HDD: 1TB Western Digital Caviar Black SATA-III 6.0Gb/s 7200 RPM HDD [2 TB no name or 1 TB WD? Went with the WD. I'm not a big fan of SSDs.]
• MOTHERBOARD: GIGABYTE 970A-DS3P AMD 970 ATX w/ Ultra Durable 4 Classic, On/Off Charge, GbLAN, 2 PCIe x16, 3 PCIe x1, 2 PCI [what does this all mean?! Will go for an Asus next time.]
• POWERSUPPLY: 650 Watts - Thermaltake SMART Series SP-650PCBUS 80 PLUS BRONZE Certified Active PFC Power Supply [I believe this build uses 520 Watts in total, so I left some room for future upgrades. Will go with Seasonic/Corsair next time.]

I'm especially worried about the motherboard. I know nothing about motherboards, so I just left it default while upgrading or degrading everything else.

No giveaway in this post since all my allowance went to the build, but I'll try to have one next time I make a thread :)

Guhh, that 1 month shipping time, though. I can't wait >.<