@Jack Revenant
because quality/marketing numbers?
i have an intellimouse 3, its old, its broken, and barely useable, but when my main mouse dies, i use that as a backup... and know what? if it wasn't for the broken nature of the cord, i would use it as my main mouse because quality wise, it just cant be matched, the mouse goes exactly where i want it to, with no give or take 10 pixles like logitech laser mouse has, even mot old optical has some give and take... but this...
there is a reason its the best mouse ever made... and it was less than 1000dpi.