We have seen many different kinds of mice over the years. Some have lots of buttons, LCD lights, or are wireless. There are a lot of different options to choose from, but that can make for a tough decision.
If you just want a simple, minimalistic option, free of all the glamor and glowing lights, then you might like the Stealth Touch Mouse. It comes without buttons or wires, and is controlled by taps, swipes, and slides from your fingers. It will need 2 AAA batteries, and it will work with Windows XP/Vista/7, Mac OS 9+, and Linux. Plug and play installation makes for easy setup, and it has an ambidextrous shape that will fit your needs, whatever they may be. You have a wireless range of about 33 ft., which makes this great for presentations, and it will only cost you about $70.