I use KVM and KM both. I use them for much more than just WoW. I usually have at least two of my three computers on all the time doing just regular stuff. I keep my one laptop on all the time for my "Magicjack" phone, which, by the way is a great thing. Using KVM and KM, I'm able to just scoot the mouse over to the other monitors and start using a second computer without doing anything. It beats the hell out of having to press a button and have hardware change the screen, resolution, etc...

It's free to try and easy to use.