Hi, I need advice on a screen for my dedicated home theater. Cost is an issue, but I don't want picture quality to suffer because of my budget. So, here goes: 1) 16:9 ratio ... 140" on the diagonal. 2) White screen, but has to be sound transparent. (Speakers will be behind the screen.) 3) I prefer a black border (frame). 4) Easy to assemble. 5) Looks amazing in a room with no external light coming in. Am I forgetting anything? What's my budget? I'd prefer to see what I can get for what ... give me choices, if you can, and explain why for each. Thanks in advance for your help, Kip P. PS I looked at 2 on Amazon ... the bad reviews really "unsold" me on those models.