I've got a USB Wacom Intuos, and I am really keen on it. The Graphire
costs and has a smaller writing area than most Intuos pads. The Graphire
also lacks a couple features of the Intuos, but Linux drivers don't
support those features perfectly.
I only have a USB tablet. Configuration was a bit tough. I think serial
tablets have more stable drivers. I prefer USB, but serial would have
been less work.
I'm afraid I don't know anything about other brands. Gimp reads the
information from the tablets through an X API called XInput. I think this
means that any tablet that sends information to XInput should have the
basic features (stylus/eraser detection, pressure sensitivity) in Gimp.
But I encourage you to try. Using tablets in Gimp is wicked fun.
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