I have the G7, USB headset, and a wireless Dinovo set for my shuttle upstairs (connected to the TV).
I used to have the MX700 as well, and all their stuff has served me well.
Totally recommend the G7 tho as the 2 rechargeable li-ion battery solution means you never ever run out of batteries and have to revert to a battered laptop mouse. oh, and it looks sexeh!
I mean just look at it...