GeoggaDid a bunch of reading on mice. The Avior comes out on top. Reviews say it has superior feel and button placements, and had the best sensor on the market today. And it's ambidextrous for us lefties. Razer has a close competitor but I don't like Razer for their Synapse software which requires an internet connection and in some ways behaves like DRM. You actually have to install, register and activate an account to use the features of your Razer mouse, or the extra HW features don't function! That's mandatory, and that's just ludicrous.