1500 hz on an optical mouse is not a direct translation to dpi. THe newer optical mice are 2000 hz but I found them to still be twitchy for the way I play. Give em a try, if you don't like them send it back. The Razors were ball mice and were 1000 or 2000 dpi. I have not tried the logitch opticals, yet, but hear they are better than the microsoft mice. IMHO