It really depends what you intend to do with this. I use Logitech G7 Cordless Mouse
, but I'm a harcore gamer, so I need the presition of this mouse. I've had very good expiriences with Logitech, they have good products, I've owned MX500
I plan to buy Razer Copperhead
because many friends have told me it performs better, I really doubt it, just because Logitech is a lazer mouse and Razer is optical (lazer mices work in every surface you can imagine, and optical have limits).
OK back in the topic I sugest Logitech, they have a wide variety of mouses
and have great tecnology in them. they last long, and give extreme presition. But again it depens what you intend to do with it.