Xserve and X terminal

Anyone have any recommendations any X Servers for Win32 platforms?

I've tested out Starnet Xwin32, and it's real solid, they just hired the guy that worked on the cygwin/X version. Just missing a couple things, like Alt+Tab send, and various AIX fonts are missing (I hate AIX CDE fonts, what's the deal).

Cygwin/X is surprisingly solid but because it's open source and not supported I'm afraid to distribute to clients.

I also need an X client that supports IBM3151 terminal.