Absolute best multiport serial card?

[Jon Meinecke]

I'm looking for the best (most reliable, fast, least impact on system)
multiport serial card for use with Xenix Sys V 386 in a 25 mHz system.
Either 4 or 8 port adapter boards are acceptable.  I have a list some
of the available boards, but I'd like to hear comments from people who
have actually used one or more of the "high-end" adapters.

Please respond via email to me and I'll summarize to this newsgroup.

Jon Meinecke