A wireless router would have worked ok for you, as they are essentially the same thing as the wired router, but with a wireless access point bundled inside of it. The prices between the two are pretty similar (wired is a little cheaper, but MOST routers at brick & morter locations that I have been to are wireless now)....
Since you won't need the wireless, you can go into the router settings, and disable it to prevent others from leeching off of the connection.
Thinking about it... I need a KVM too, but I am too cheap... lol, I just have 2 mice on the pullout drawer, and 2 keyboards, 1 under the desk..