1. Not a heavy gamer
2. Video Encoding
3. AMD'er for years
Honestly, as an Intel Fanboy, I think that Bulldozer MIGHT just MAYBE be a good option for you. The FX-8150 supposedly shines the most in massively threaded benchmarks, which is very similar to video encoding. And if you plan on gaming only occasionally, the FX-8150 is not going to bottleneck you in any meaningful way. (Yes, if you play at 640x480 and you want 1000+ FPS.... )
Oh, and Bulldozer overlocks like a mother.
I think it's a toss up between the i7-2600k and the FX-8150.