The lightup 'Z' on the mouse looks pretty neat! But I think I'm going to stick with my Logitech G5

I just bought it on Saturday because my old Logitech Dual Optical mouse gave out on me after 5 years of faithful service

This thing is crazy.. it uses a new laser tracking system instead of optical giving it 2000 dpi and letting you use it on any shiny surface except for clear glass or a mirror. If you've used an optical mouse for any period of time you know how bad the tracking can be on a barely shiny surface, but this thing practically works anywhere. It also includes a weight cartridge that you can swap little metal weights in and out of to customize up to 38g of weight.. I use it at full weight and it gives a very nice sturdy feel to it.

The G5 also allows for sensitivity changes on the fly from 400 to 800 to 2000dpi with a handy little LED display that shows you which sensitivity you're using.

I swear by Logitech .. I've never had a problem with any of their products, and generally they look much nicer than any of the competition imo