I cannot believe no-one has mentioned the logitech g700s. I have the logitech mx-518 and yes, it is very, very good. I was reluctant to go wireless for so long because of that *tiny* bit of lag that you feeeeel when gaming (modern mousies have overcome this lag). g700s is super comfy, simple, functional, and feels very, very good. I have kinda large hands and the main prob i have with mousies is they don't fit (mx-518 was even a tad small). g700 fits very nicely, and I am even hanging off the back of it and it is still comfy. My friend recently bought a Razer Ouroborus and he still regards my mouse with envy. Oh and one more thing, compared to a LOT of wireless mice that I have encountered over the years, g700 is surprisingly light; not a brick, and not a feather. I would give it a heck-of-a-thumbs up. Good looking thing too.