Performance MX (<a href="http://www.logitech.com/en-us/product/performance-mouse-mx" rel="nofollow">http://www.logitech.com/en-us/product/performance-mouse-mx</a>) is still my favorite mouse for more than 4 years. I still haven't found anything better. It has few extra buttons, good battery life, good DPI, scrollwheel that you can set to two different modi and it lies well in my hand.<p>It's a little pricy, but it's worth it.