I work on the Screen scanners, from 888, 757, 747, 608, to the desktops units.
The best is the SG-8060, which they only stopped making just 2 or 3 years ago.
This one uses the same large drum as the old 757s, and even the same photomultipliers, yet is compact and runs the desktop software with control from a mac.
What's nice is that since it was still made only a few years ago, it runs on Mac OSX, and even an Intel Mac. All the others are stuck on beige box macs running maybe OS9.