Good God, some of that stuff sounds expensive.
I'm a lefty so i dont have a gaming mouse, but i do use a Microsoft "bogstandard"
Its a 6 function neutral laser mouse, robbed from my Dads work!.
I also own a Dell Ball mouse! which still works fine!
Ive been told to Get Razer lachesis, as apparently its a good choice for a lefty.
My mouse Pad is a BriteMat NRS, which is probably about £1 from tesco.