Which KVM switch do you recommend?

[Ed]

How about skipping the keyboard/mouse altogether and look at Synergy2
* or look into connecting the systems via VNC.

*http://synergy-foss.org/

>> > Searching for a new KVM switch to replace my 20-year old unit that still
>> > works fine and switches instantly ... however it has very old (pre ps2)
>> > keyboard ports that require adaptors and 9-pin serial ports that I don't
>> > know if they can even be made to work with new usb connected mice.
>> >
>> > Looking at the plethora of new brands and models is terribly confusing.
>> >
>> > shopper.cnet.com lists 278 different 4-port models
>> >
>> > I've looked into Tripp Lite, IOGear, Trendnet, Aten, Belkin, Linkskey,
>> > several models of each, and several more brands ... all under $60.