G7 is a really nice mouse, I use it on my desktop PC, however I would find it a little "too much to carry with" to have it with my notebook. The receiver/transmitter/battery charger is a little large plus it has the actual receiver that you have to insert on to (USB port).
VX Revolution is what I personally use with my 9750, what I like most about it is the receiver/transmitter hides inside the mouse, so you never have to dig through your bag to find it, at the same time when it is inserted into the mouse it will power the mouse off, so you are not wasting batteries.
I do play games with it, find it pretty good (not G7 like but pretty good), it does not require any mouse pad so you can use almost anywhere (except for glass of course).
You can find the VX Revolution for under $40 on the net, and that is a pretty good price.
Amazon Market Place has then NEW for under $36
Hope this helps a little.