Personally, I'm partial to the Amstrad PCW line.While it was marketed
as a dedicated word processor in much of the world, it had gobs of RAM
(at least 256KB), high-resolution monochrome graphics (720x256) and
shipped with a very nice CP/M Plus implementation which included a
better-than-average BASIC as well as DRI LOGO and the GSX graphics
libraries. The non-standard 3 inch floppies are a bit of a drag, but
it was fairly easy to add 3.5 inch drives and even hard drives were
available.
Mike