you can now try out paraniodandroid on the x. it's a continuation of shadowMOD ROM and is very well supported and updated consistently. pretty fun to play with tablet ui and some of that stuff. that's on rootzwiki.
i still use miui. wiz is still doing a few things for that and it is super stable.
otherwise, a modded stock is still being updated and i believe vxl is also being updated. all of these are on rootzwiki.