I like the Microsoft Comfort Optical Mouse 1000 - I bought it as a cheap replacement mouse, and it feels good and does everything I need it to. If I was you, however, I might use this as an opportunity to get use to that fancy neutral grip mouse above, what with the 12 to 14 hours a day at the computer. Pronation isn't a great position to be in. I notice my right forearm naturally pronates when hanging loose.
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