I'm looking for a basic USB KVM. Basically I want to hook up a Mac to an LCD monitor via DVI and a Windows laptop to the same LCD but via VGA. I really only need a KVM that can handle splitting a USB signal for my USB keyboard and USB mouse. Is there anything cheap that will do this? I don't want to spend $80+ on a full-blown KVM since I don't need the video aspect, and if it's more than like $20 I might as well just unplug the two cables from the laptop and plug them into the Mac when I want to switch