Comment MASTERVIEW CS-104 (Score 1) 263
We use about 20 of these things and they appear to operate without a fault. I note some of the other postings here mention all sorts of problems with "I have to hit NUMLOCK after switching" or "The wheel mouse doesn't work". It surprised me because I just never notice the damn thing - it just works. Admittedly I haven't tried driving it above 1200x1024 - if you want to be extreme, better read the specs.
For my money (actually for my employers money! - and I have no idea how expensive they are) I'd vote for the MasterView CS-104
I use it on 3 Linux boxes and a Dec Alpha, no worries!
Bob (no affiliation with the manufacturer!!)