No, gaming mice and keyboards are not worth it.
You're better off getting an ergonomic multimedia keyboard and an N52.
I don't like those 12 button mice as they get in the way, I prefer my left mouse click and right mouse click the the middle button and scroll wheel.
It's an old mouse and I don't see any problems with it.
Although if you want to, let's say, play battle field 2, and switch the DPI from the tank (which you want fast) to the sniper (which you want slow) to infantry (which you want medium) you would benefit from getting a gaming mouse, I think the mx518 does that.
Don't get the mx1000 as you can't replace the battery, it has to charge so one it's dead, better have another mouse handy cause you ain't usin that one till it's charged.
I recommend the G7 laser cordless or the mx 518 if you need those extra features.
The N52 is a gamepad, yes gamepad not controller like you see on consoles, that you can program each button, and it fits your hand so it's not as hard as a keyboard.
http://catalog.belkin.com/IWCatProductPage.process?Product_Id=157024
Don't get the logitech g-15 keyboard, it's a piece of crap and it doesn't even really have an LCD it's a dot matrix.
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