I'm going to get a FX-6300 most likely, but I need to know if its good for playing games over 50 fps on games like BF3 and PlanetSide 2 and BO2. I have a GeForce GTX 550 Ti and 8 GB of RAM and a resolution of 1920x1080
That cpu won't be holding you back. It's going to be your 550 Ti. There are better Intel processors but if you're only gaming at 1080P then perhaps you should upgrade your gpu too. Nothing extreme. A new 7850 or 660 will run perfectly at 1080P.
I'm running the FX6300 on a Gigabyte 990FXA UD5 board with 2 7850's in crossfire. I've had to run BF3 on auto to achieve an average of 60fps in 1080p. It's a great processor and I'm glad I picked it over the 955 Black Edition.