My first post. I've checked FAQ and didn't spot an easy answer to this query. I'm setting up my first home theatre system. I'm going to use it 50% for DVD viewing (16:9) and 50% for video/TV (4:3). I will project onto a screen, mounted on a chimney breast. The walls on either side of the chimney are dark (the relevance of this will become clear soon). There is a beam running parallel with the projection axis entering the chimney breast 2 feet from the ceiling. I'm fairly keen on the Epson TW10 (16:9). 3 questions (in order of importance): 1. Which aspect ratio should I go for? 2. Assuming using a 16:9 projector then, using zoom, I intend to project the 4:3 images onto a 4:3 screen thus maximising 4:3 image area while still achieving equal 16:9 image area. How significant are the grey pillars of light spillage at either side of the image likely to be in 4:3 mode, considering that they will fall onto the dark wall? 3. The wooden beam prevents use of a ceiling or high wall mounted screen. I may mount the screen along the skirting board and pull it upwards to a hook on the wall at eye level. Do they work upside down or does this interfere with the mechanism? All advice welcome, thanks in advance.