The weights it comes with are optional, the G502 weighs almost nothing (it weighs less than a 3" pocket knife) and you can cut the weight down by swapping out the scroll wheel. The latency is unbelievably fast in all games and my hands are the same size as the op and I use fingertip grip with a wrist rest. Also the pads are super low friction and rated for many kms use, and the buttons have been tested for millions of clicks without failing unlike some other mouse brands.
I wouldn't buy another mouse if you gave me the money to do it. Logitech for life (at least for mice). I used a MX518