First Computer Build - Just not sure

So, this coming fall I'm planning to reach a critical point in my life: building my first pc!  
I've been scouring guides and using pcpartpicker quite heavily, trying to find the best combinations for what I'd like.
This isn't going to be a top-of-the-line gaming pc, but I'd like it to be able to play graphics intensive games (WoW, Skyrim, etc.) on the highest settings while not even coughing at video editing and multiple applications.

My price point is somewhere between $900-$1300 so here's what I have so far (which is a bit too expensive).


Intel Core i5-2500K 3.3GHz Quad-Core $213.79
Corsair H60 74.4 CFM Liquid $59.99
Asus P8Z68-V PRO/GEN3 ATX LGA1155 $139.99
Corsair Vengeance 16GB (4 x 4GB) DDR3-1600 $94.98
Crucial M4 128GB 2.5" SSD $107.95
Seagate Barracuda 3TB 3.5" 7200RPM $132.57
EVGA GeForce GTX 670 2GB $390.04
NZXT Phantom (Black) ATX Full Tower $119.99
OCZ 1000W ATX12V / EPS12V $179.98
Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer $19.98

Total: ~$1450


I'm rather fond of the case and I feel like that particular CPU is a good choices for its easy overclocking abilities, but otherwise I'm open to changes. I want to be able to (if I choose to in the future) expand my hard drive storage and maybe even add in an extra graphics card (hence the larger watt power supply and full size case).

Just looking at general pricing I feel like my PSU is a bit too expensive and I may have a too-cheap motherboard, but I'm still not sure.

Suggestions?