My personal take on this is as follows; Read up on overclocking, see what is involved. There are excellent stickies here at Tom's, more at Overclockers, and still more at Overclock. All are good sources of info. Ask questions here for clarification of what you've read (sometimes it doesn't make sense at first).
Once you are familiar with what is involved (including risks), you will be far more prepared to go that route. Personally, I would hold off for now.
BTW, FSX will happily take (and use) the extra speed so it is a viable option to take once you're prepared.