I have a G502, and I absolutely hate it. I get the twitching on any DPI (though, oddly, mine's better at the highest DPI). There are way too many buttons, my right click is spotty, the cord is fraying, the skates are in abysmal shape, and the stupid panel that hides the weights falls off all the time. -8/10, would not purchase again.
I'd like something with the basic features of an Intellimouse (5 buttons, optical, good tracking) in a better casing. I was looking at the Ducky Secret and the Zowie EC-1A, but I don't know which I'd prefer, and the Zowie has a 1-2 month lead time on Amazon! Microcenter has the FK1/2, but I don't know.
Anyway, recommendations welcome.