When deciding PSU's read some professional reviews. AKA jonnyguru.com and hardwaresecrets.com There are other good PSU review sites but those are basically the best. I'm assuming off your previous collection of parts you've got a DVD drive.
If I'm wrong ~20 bucks.
Down to business.
i5-2500k-best price/performance. keep
Mobo: ASRock Extreme 3 Gen3
GPU: I would recommend any 560ti or above. EVGA, MSI, and a plethora of other companys make great GPU's. This is a great card for cooling and performance.http://www.newegg.com/Product/Product.aspx?Item=N82E16814127594
The difference in the vram isn't as noticeable now, but future games are going to take more. 2 gb isn't going to change your FPS much right now.
RAM: Both company's you listed are great. I have the G.Skill Ripjaws X series 1600mhz version, and love them. Don't pay for more than 1600 mhz, and below 1333 either. (IMHO)
Case: HAF 932 or 922, CM 690 II, Lian Li cases. There are tons of choices here...
PSU: Corsair 650 or 750 modular your's looks good too.
If you can fit it, people who have SSD's love them. Not needed though...
Now I'm sure somebody more helpful will come along but this will get the ball rolling.