For a nicely improved video experience you might try to snatch a PDS graphics adapter (look at our
List of video cards). In combination with a commslot ethernet adapter you could use both external video (extended desktop) and network connection.
Suggestion for an extra modification: probably the onboard video of a 575 board provides better performance and colour resolution than most PDS cards, especially on a large screen. (It might turn out to be difficult to find even a monochrome card for the LC PDS.) How about redirecting the signal of a pds video card to the internal video port and using the 575 onboard video to drive an external screen?