I'm considering getting a better mouse, mainly for the purpose of gaming. Currently, I'm using this cheap-ish mouse, the Logitech M305 . I've found it much nicer than cheap mice for ten euro or so, but I have noticed a few cases where it is less responsive than I'd like and it only has three buttons. Plus I'm on my third one as the scroll wheel eventually breaks on it from the left/right scrolling. I'll probably keep the M305 for non gaming use, as its small size and wireless means it's quite handy for bringing around.
My maximum price range is around €50. Logitech's two mice in that price range seem to the Logitech MX518 and G500. Of these two, the g500 seems more appealing as it has more buttons (10 to 8) and the photo of the MX518 makes it look like it has a weird bumpy texture, which would probably drive me insane.
One worry for me with both these mice is that the left and right mouse buttons aren't as well defined in the mouse as they are on mice I'm used to using. On other similar mice (some cheap one I got with my last desktop, the Mac mouse), this has annoyed me, though I'm not sure if that's a failure of that design, or just a failure of cheap mice with that design.
Razer also has the DeathAdder mouse in the upper part of my price range, but it appears to have less features and buttons than the cheaper Logitech mouse, so I'm unlikely to go for it.
However, I've never actually used any of these mice. My experience with gaming mice is mostly confined to my friend's Razer Naga, which was pretty nice to use, but is out of my price range. So I'm asking here for opinions of those who have. Which ones have you used, and why did you like them or not like them? Does the difference in DPI between the Logitech and Razer mice make much difference? Are there any other brands I've overlooked?