I based my choice on x600 nova. various concerns only return product, like koné +. I then wanted at any cost ceramic pads, here I am directed to this revoltec FightMouse elite (and not as mentioned on amazon Elise ^^). Perfect glide (associated with a gamer carpet Nova SX1), delivered with weights and a support that fits itself to the mouse if you want to place the ear, I use it's great. DPI settings on the fly, profiles and macros can be configured via the software is very simple and ugly, but rudely clear and effective.
One product I recommend easy, especially since it is complicated to find.