Ok, after doing some lurking around here I have ruled the above room out, too large, too many windows and just all around bad layout with the soffit, fireplace and post. Luckily, the room right next to it is perfect I think.
One small window to deal with, doesn't get direct light, sound isn't an issue neighbor wise, nearest one is pretty far away, two acre lot. Will still want to soundproof eventually to isolate from the main floor, our bedroom is on the main floor.
The alcove you see in the second photo is where I was thinking of putting the screen, it's not wide enough right now but should be easy to knock that wall on the right back and get plenty of room. At least I can't think of any reason besides the alcove that it is there, shouldn't be any infrastructure back there, if anyone can think of any your knowledge would be appreciated. Room dimensions counting the alcove is 20Lx18Wx9H, I could always mount the screen in front of the alcove or build the wall out if there is something behind those walls but that would give me a square room and I understand that's not good sound wise. Also only being 20' knocked to the back wall and 18' if I have to build out that makes two rows awfully tight.
Decided to go ahead and cannibalize my Ascend front sound stage from the living room instead of using the old paradigm's, will use those for sides and surround, question is, use which sizes, floor and mids or mids and bookshelf paradigms for that?
Also, Using the BenQ calculator for the W1070 I come up with a screen size of 140", is that ok? Puts the projector at 13'3" and front row, all I am doing at first, eventually want to shoot for two rows of three or four seats, at around 15'.
My other question, keeping in mind I will be gaming on this set up is should I use the Elite receiver I mentioned above or use what I was going to replace it with, probably a Denon 2113cl. Oh and will obviously close off the door in the back you see that opens onto the larger room that has all the windows.
Any help is greatly appreciated, thaks in advance.