[WriteLog] serial interface PCI expansion boards

[N2TK]

Time to add more serial ports. I just have the 2 that are on the
motherboard. Which one to buy? I see serial boards offered by Boca, SIIG,
Lava, WinComm, Rocketport, etc. It seems they all use one IRQ. Is there any
problems with using one IRQ? If not, I can save a few IRQ's by installing a
4 port serial PCI card and disable the onboard serial ports. If performance
is better by using individual IRQ's, then I can get a 2 port serial card and
use these ports along with the 2 ports on the motherboard.
Is there a preferred PCI board(s) and/or ones to stay away from?
Tnx
Tony
N2TK