When painting, be sure to use flat paint. Not eggshell! FLAT.
The screen is all about the material and the frame. If you think about how a projector works, it is creating the light, but the screen is the other half of the equation. If the screen doesn't provide a perfectly flat surface with accurate color, then the end result will be a poor quality image, always. Likewise, a good screen will last 10-20 years, while a projector may be replaced after 7-10 years. So, a screen is a long term purchase, while the projector is not as long term.
Finally, a good quality screen will not just have a good surface, but will have a frame which is wide and supports the screen material fully. It will provide a beveled edge which eliminates any chance for shadowing, and will provide a deep black surround material which will soak up any overscan light. It will also have a mounting bracket which supports the top and bottom in a manner which prvents any screen sagging.
Manual screens do not offer this at all ($100-$250). Electric non-tensioned screens do not offer this ($200-$1,000+). Cheap tensioned electric screens may offer this ($700+). Cheap fixed frame screens are not nearly as robust and are not as accurate ($300-$600). Boutique and higher end fixed frame screens tend to be overkill for a proper theater environment ($1,200-$2,500+). So, the $900 Carada is not an expensive screen by any means when you consider that you are looking to achieve a bright, high quality image with a wide viewing angle that faithfully delivers excellent black levels and great performance.
I have used Draper, DaLite, Stewart - and the Carada is virtually identical in quality.
I've also used Elite, Focupix, and a couple other cheaper brands, and Carada exceeds them in quality.
So, for getting a top notch screen, for a fair price, I recommend them over others first.
If you want a good image, then a good viewing surface is a must, and you are free to get Draper, DaLite, or Stewart if you want that same level of quality, but you will then realize that $900 is not a lot to spend on a quality screen.
A GOOD in-ceiling tab-tensioned motorized screen typically starts at about $2,000.
Thanks for the quick response!
Sorry, it is the new one, so the X30, not the X3 for 3100 with the mount (model unknown).
As I still no nothing about the world of projectors, I must say my initial reaction to a 900 dollar screen is 'It's just a screen, why 900?'.
Is such an expenditure really necessary? And why?
Yes, I definitely plan to paint the walls. I was thinking a real dark blue. Carpet is not dark, not bright I would say.
Thanks!