I purchased a new monitor for my computer, and I would like to use it with my 360 as well.
Monitor: Clicky Connectors/ions: D-Sub, DVI, HDMI Input Video Compatability: Analog RGB, Digital
1. Will sound work as well? additional cabling required?
2. Also once accomplished, is their a switch that can be used to alternate from 360 back to Computer?
Bro DVI is video only so yes you will have to plug the red and white RCA jacks into a set of speakers, receiver, ect. You should be able to get a AVI to DVI adapter and connect your xbox to the monitor using the AVI connection wire that is sold at many retailers. If the monitor has a AVI and DVI connection then yes there should be a button to switch to and from the AVI/DVI (unless it is a cheep monitor). However if you want to run both systems on the DVI then you will need a switch box to connect both the PC and the xbox to.
Get the MS or generic brand VGA cable. Works just the same as the normal AVI cable, but it has a VGA (D-Sub) connector on it instead of component/composite cable. That will plug directly into your monitor and then you can either use the red/white cables to route to stereo speakers, or plug an optical cable into the jack on the VGA/AVI cable and route optical audio out to your receiver.
If you want to alternate back and forth between your PC and your Xbox with ease, you can just connect your PC to your monitor using the DVI port and your 360 using the VGA port, and I imagine that you will be able to switch sources on the monitor itself. If not, you can buy VGA switches that accomplish the same task.
Look ha2fb, just buy an Xbox 360VGA cable (gamestop sells them used for 10 bucks). It'll have a VGA connector and 2 audio connectors on the end. It will plug directly into the VGA (aka DSUB) port on the monitor. If both VGAs happen to be male, just get a 5 dollar gender changer from Radio Shack or any computer store. If your monitor doesn't have audio inputs, then run the red & white audio connectors to a set of computer speakers.
I've got 3 Xbox 360s connected to monitors, a 20 inch HP LCD, a 17 inch Compaq LCD, and a generic 15 inch CRT tube monitor. Piece of cake (you're making it harder than it has to be).