I like the Microsoft Internet Keyboard Pro, partly because of the USB ports, but mostly because of the other features, such as handy buttons for volume control and for email and for the web.
Depending on your physical setup, you may or may not find the USB ports handy. e.g. I have a tray to slide my keyboard under my desk, do I don't plug anything into the keyboard permanently. I just use it for things I plug and unplug on a short-term basis. And, the keyboard hub is unpowered, which limits the range of devices you can plug into it.
The MS Keyboard has both USB and regular keyboard connectors, so you won't have to worry about whether or not it will work in Safe mode or in Dos.