sprockets?

i am about to change mine to and was just wondering if their was a better sprocket combo to get some more oh shit power without losing much top end.

I Moved down one tooth on the front sprocket and left the stock size on the rear.  you can use a stock size chain so if you change your mind later on you can switch back without buying another chain.  as far as top speed goes it bumped me down to about 125 topped out, but it gets there fast, right now with the help of a few other mods I was ahead of my buddys 03' F4 by 2 bike lengths 0-100