I also use the v1 g15 and love it. Its boggled my mind how Logitech has gimped all the future versions (less buttons, smaller screens). You would want a g510, its closer to the original g15 then the latest 15 or 19. I check vent with the lcd during raid night and have all sorts of keys mapped out, like the above posters for mounting, drinking etc. I picked up a g13 as well which I thought I would use the thumb stick for moving the slaves; however i realized my desk has no room and sadly it sits on a shelf in the closet. If you have the room its a great addition. There is a g15 button addon which lets you place your bars in order of the key setup, I find that to be quite useful on some toons as well. hope that helps your decision