Originally Posted by Projector
Get the 2500k and if you cannot afford that then go for the 960t even that is way ahead of the 8120 in performance. FX is a serious step back.
In no possible way in hell is the 960t ahead of the 8120, esspecially in the applications like video editing. That is just an outright fabrication. I dont know where you're getting your facts from but you need to check again Boyyoooo.
That being said, OP, I dont think your friend would be disappointed with either of two (2500k or 8120), They both perform similarly in video editing tasks, but slap a nice aftermarket cooler on the 8120 and take it up to around 4.5ghz-ish and it really starts to perform admirably. And given the price savings you would achieve by going with the 8120, you could easily afford to throw in a very nice aftermark cooler to really push it to its maximum. You wont notice much of a difference between the two in gaming, as long as you pair it with a decent video card and play at a good resolution.
Though if your friend is ever considering a nice SLI/CF setup, the 2500k would be the one to go with. Guaranteed either route you take you wont be disappointed.