Apologies if this isn't in the correct forum. I wasn't sure which category to put it in.

My dedicated home cinema room is virtually built so the fun bit is about to begin but i would really appreciate a few opinions on a couple of matters.
1) I'm aware that pretty much all the films nowadays are in a 16:9 format but is there any reason why i should be considering a 4:3 type screen? I like the idea of a BIG screen and 4:3 tend to look more impressive.(am i way off here?)
2) I can't seem to find a uk supplier of permanently fixed screens. Anyone and recommendations?
3) I am considering the ptae300 projector and am wondering how much of an issue it would be if i didn't have the projector completely central to the screen. (possibly about 15 degrees off)
my progress so far