this has some people doubting that 5 instances can be run without trouble in heavily populated areas.
Well maybe at 60fps with all effects on. I really doubt that kind of machine will have any trouble runinng 5 wows anywhere. I'd go with that plan if you only plan to run 5, i7/x58 etc. and a good 24 or more inch monitor and thats yur best bet. I have doubts about the 5 small computers kvm idea. You could try two computers, one for your main on one monitor with full resolution and effecets and then the other four at way lower effects on a 2nd compouter/monitor