Get an amiga instead
lol. yeah get a western machine with terrible games instead! wowowoooooooo!
lol.
I vote you get an MSX. You've already got a PCE, so the 16bit era stuff is all set for you.
X68000 is OK, but for the effort to get one going, and all of that crap, you aren't really gaining much versus just having PCE and Megadrive stuff.
MSX is from an earlier time and offers something completely different in the form of all those goofy early 80s style games.