KVM Switch boxes (semi-off-topic)

Does anyone have any experience with digital KVM (Keyboard/Video/Mouse)? I'm
looking for a four port that will sync well between my windows and linux
boxes. I'm wondering if there are any to stay away from? Any
recommendations?

Linux/Windows refresh rate sync problems?
USB support problems?

Thanks for any help you can provide!

..:: Randy Melder ::..
602-279-0135 - www.spininternetmedia.com