Just spent a month using a Microsoft Optical laser mouse with the latest version of Intellipoint (we test hardware for many manufacturers - more free stuff!). The tracking was not great, and ergonomics of the mouse were not as good - the MS mouse is taller and forces you to hold your hand higher off the desk.
After reinstalling the Logitech mouse (you also need to run the Advanced Mouseware utility to set the mouse speed for CAD programs like Revit), I'm amazed at how much better the Logitech mouse works.
Those of you wanting to really max out your productivity, consider the Logitech MX310. You have six buttons that you can program using Mouseware vis a vis Chad Smith's great post.