Help.

[Gadget]

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.

[Gadget]

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

[Sly]

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.