I recently purchased a Logitech Wireless Optical Mouse for my laptop. I love using it vs the touchpad - much more control.
The only thing I don't care for is the piece that must be plugged into the USB port, but that's only a problem because the USB ports are on the right side of my laptop and I have to be careful how a place my laptop when I'm using it.
I also have to remember to turn the power off on the mouse since it operates on batteries. I used to have one that was rechargable, but it didn't work well with the laptop since you had to plug the base into the laptop which hindered my mobility.
Good Luck.