This is the mouse that has come out to replace the G403 Wireless.
Sells for about $99-$125 so it's a great price.
I'm not sure if they have an official website (but they have been listed on ozbargain before) - so note to mods I've just placed a store website for now (ignore if you're not a mod).
Hopefully better then my G403
Two in a row developed scroll issues after a while