I didnt realize you were using a flat screen monitor, (I read that in a different topic). Refresh rates wont matter as much for you in the first place, since they dont flicker, they fade out, like you can see when you make a quick movement. You wont really notice an improvement between 60 and anything higher. However, incase you feel the need to push your comp anyway... You can check your monitor frequency somewhere in the monitors menu. (the buttons on it, not a driver prgrm) I have a viewsonic crt, and its called the "viewmeter" on mine. It tells you the current res and frequency.
-About your fps thing, lately my fps have been dropping with the raise of my ping. I think the server is set so that your fps, drop instead of you freezing in place, and then appearing 10 steps ahead out of nowhere.