bakedjake - 9:06 pm on Jan 26, 2012 (gmt 0)
First pick: Microsoft Trackball Optical (no longer made, really hard to find)
Second pick: Logitech MX Revolution - First Version (no longer made, easier to find, but be careful because the new version isn't as good)
I hate trackpads. I always turn mine off on my laptop - my Lenovo has the pencil eraser which is much better, imho.