So I'm also a major NEWB when it comes to projector/screen and sizing but I've been wandering the same types of things as the OP - I have about 8'8 of space from floor to ceiling... will I be dealing with the same issues?
Like the OP, I would like 1080p and 3D... not sure what else I need want other than a great picture at a great price. Right now I'm working on a $1500 budget for a PJ but I can save my money and get more if needs be. $3k is definitely my limit though.
What kind of projector should I be looking at?
Why should I be interested in a 2.35:1 ratio? What are its advantages?
Are masking systems an option or are they going to be ridiculous expensive?