the FX 8320 is a decent cpu for the price. Most of the time the graphics card is the be all or end all of whether a computer can play a game or not (with the exception of game that require alot of CPU power). The fx 8320 is sufficient for current mordern games, but dont expect to be able to upgrade into something newer in the future since AMD atm does not seem to have a plan for a new line of FX series processors. If you go intel with a Z97 motherboard, you have the option of upgrading in the future.
Hope this helps!