If you have two VidCards for the 2300c, you can disable the ROM in the Dock and run two displays off NuBus and have the LCD active as well. Two VidCards and the Dock Video would be better overall however.
MiniDock Video, LCD and SCSI Video also gives you three screens on the 2300c.
190, 5300 or 1400 with internal Vidcard, SCSI Video and the LCD would give you three screens as well.
MiniDock Video, LCD and SCSI Video also gives you three screens on the 2300c.
190, 5300 or 1400 with internal Vidcard, SCSI Video and the LCD would give you three screens as well.