Quote from GTS:
If you need it to be rock-solid go with a hardware KVM then you don't have to worry about a software bug causing you to have problems
For your setup only hook up the keyboard and the mouse to the KVM, not the monitors...works fine
I've used Linksys KVM's without any problem, example: http://www.newegg.com/Product/Product.aspx?Item=N82E16817107702