[*]Right now I have my Blu-ray, DirecTV STB, and Wii all wired to the AVR via HDMI, and then a single HDMI cable running from the AVR to the TV. Will I still be able to do this with a projector? Yes. That setup wiill work fine.
[*]I currently have an Ethernet cable wired to the TV. Will I be able to do the same with a projector? (can I still stream Netflix, etc., or can/must I do that via the Blu-ray?) . SmartTV functionality can be found in many devices such as a Roku, PS3 or most new blu ray players. I believe Logitech has a decent device as well and they're all relatively inexpensive.
[*]Given my entertainment center there below the TV, will this allow me to use a 100" or larger screen, or is it simply too large/high? You might be able to get away with it. Most online vendors will be able to give you the width/height of the screen you're looking at.
[*]Although my drapes aren't technically "black-out" drapes, they do a pretty good job of keeping the light out when closed. There is an identical window with identical drapes directly to the right of where I am standing to take the first photo. Is this enough light control? I purchased a set of Bali shades that block out 100% of light. Look and function much better than drapes.
[*]Will fan noise be a concern since I'm assuming the projector will be directly above the primary viewing position? Newer projectors have become much quieter. For a 100" screen, you're not going to need a light cannon or have to run your projector on high. Fan noise shouldn't be a problem unless you pick a projector with a noisy fan.
[*]How big of a deal are the various aspect ratios? I wouldn't worry about this too much. All of the good projectors being mentioned here are 16:9 projectors.
[*]What would be the very next step up from the Epson Home Cinema 5010 or JVC DLA-RS45? I'll let the lcd guys answer that question. My thought is the RS55.
[*]Would you recommend a fixed screen mounted on the wall, or one of those automatic retractable ones? Fixed is always better if you can do it. If you need to hide the screen, then go electric.
[*]When you suggest a screen size for me, can you also indicate how far back on the ceiling the projector will need to be mounted? That is dependent on the projector as they're all different. You can use the projector calculator at http://www.projectorcentral.com/proj...ulator-pro.cfm to help determine the throw distance.
[*]Is there any "warm up" time for a projector, or will I still be able to grab a plate of food, walk downstairs, turn everything on, and immediately start watching TV or a movie? Projector lamps all need a few minutes to warm up to full brightness. Usually takes just a couple of minutes.
[*]If a select a projector like the Epson Home Cinema 5010, JVC DLA-RS45, or the next step up, will there be a lot of calibration necessary, or is it pretty much ready to go right out of the box. Or, will there be calibration settings posted here I would be able to use? I'm in Southwest Missouri, so having an ISF tech come out is not an option. There's tons of settings available on this site you can use. Of course, you could always do a basic calibration yourself using a calibration disk.