Jim Kelly wrote:
the 3950 is **clearly** the best of these for gliding . .

No, the 3950 is **clearly** the best for use under office lighting,
thanks to its transflective screen. The 36xx, 37xx, and 38xx have
reflective screens, which my eyes find somewhat easier to read under
direct sunlight. The 31xx may only have a grey scale screen, but it has
better contrast in direct sunlight than any of the color models. In
reality, none of these devices can beat the contrast or clarity of the
screens on the SN10 or B2000, but they do look prettier during those
moments when you can actually distinguish the colors...

Marc