After owning 4 different mice and........
3 different tracking balls, I've come to love the Microsoft Wireless Notebook Laser Mouse 6000. This one is in my opinion, the best (non-gaming) one available at this time. When the Logitech V400 comes out, it may take the top of the heap rights but for now, I don't think you can find anything better than the 6000. The tracking is outstanding, it has a very small USB sending unit that snaps in the bottom of the mouse for carrying. Every button is programmable in multiple ways. The scroll wheel is the tilt type and can be programmed for magnification if wanted. The "Back" button is small yet right where you want it for effortless touching. The mouse as a whole is very well designed and fits my hand perfectly.
When the V400 comes out, I will probably wait about a week to read more reviews and then make a decision. As far as I'm concerned, it doesn't make a bit of difference what notebook you have it you don't have a quality mouse. Also, wires are a thing of the past. I know some guys like them but every time I look behind my TV, I get a stress head from just looking at the spaghetti mess of wires. My notebook most of the time has one wire connected to it, the power feed and occasionally my speaker feed wire but other than that, I try and keep it wireless as possible. Once you go WiFi it's very hard to go back to a wired set up. With the accuracy and quality of today's wireless laser mice, I can't understand how anyone would want a wired mouse but to each his own!