It all depends on what your typing preference is. I use a blackwidow and love the nice tactile feedback, although most people like the k70. Switches are what make the keyboard.
Cherry MX Red- Least resistance and tactile bump, good for low noise gaming
Cherry MX Blue- Decent resistance and a noticeable tactile bump, fantastic for typing and gaming, slightly loud.
Razer Green (What I like)- Average resistance and a noticeable bump to let you know when youve pressed a key. Average noise.
I would recommend the k70 or the blackwidow for FPS.
Congrats.