I use X68000x now for a long time and I am still really happy with it
But there is one thing I didn't notice in the readme until yesterday:
QUOTE
Some games require framerates greater than 60fps. To allow for this, the refresh rate
must be "turned off" to allow immediate refresh of the screen.
This looks very interesting for me, as there are really some games that run not in fullspeed for me and I always set frameskip to 2 in order to make them playable. But maybe if I do as said in the readme, by turning off that refresh rate, I don't need to use that frameskip option anymore and the games will look better.
However I can't find this "refresh rate" option anywhere, is this part of the XPort GUI
Would be great, if someone who knows, how to use that option could help me out here 
Thanks again XPort for this great emulator and making it possible to play X68000 games on the Xbox