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Hey SF, I have been remodeling my basement to become a home theater, but I need some help with a few things.

I am getting this projector: http://www.amazon.com/Optoma-HD20-Defini...B002G0CWSU

And I want to hook it up to my 360, Ps3, and Gaming Computer.
I already have surround sound , Bose 5.1, but I need a new reciever as that one is broken.

So my questions are:

1. What would be a good, cheap surround sound reciever?

2. What is a good wireless keyboard that I could use for my pc.

3. When I make my projector screen, should I make it 4:3, 16:9, or 16:10? (Why also)

4. Can I route all of my devices through the surround sound reciever, and have one hdmi going from the projector to surround sound?

5. My video card only supports dvi input, but I have a Hdmi-Dvi connector, however, will this transmit sound? The projector has a dvi input, but will sound transmit through that?

6. 120" or 100"?

Thanks for reading this and helping me out.

Ok, I learned the answer to 4, but what about 5?

It would probably help if you were to post the specs for your video card and the projector, so people can see what the setup is like. As far as I know, DVI is the same as VGA, and only transmits video.