Both Carada and Elite make a great product that is very affordable. I currently use an Elite EZFrame Cinegrey screen and it's a great screen. And I've done measurements and observations on just about all of the Da-Lite materials, Stewart materials, Carada materials, Elite materials. Beamax materials, the dnp Supernova, Screen Innovations Black Diamond materials, and many more that I've forgotten. The main thing that folks forget to do when they are comparing materials is to adjust their white and black levels properly. And the cardinal sin of comparing screen products is to never compare a white screen to a gray screen. The result is predictable. If you need a gray screen (personally I believe you need either a gray screen or the High Power looking at the light you're gonna have to deal with), compare it to other grays. You won't be sitting in your theater watching movies with a white reference in the middle. So don't worry about your whites, they will look white.
The High Power is a nice material. But it requires a specific setup and proper seating to achieve it's best. If you cannot do that, you're much better off with just about anything else. And between the Carada and Elite, Elite's gray is much better product. That being said, I think Carada's Brilliant White is a better white.
Is your projector ceiling mounted? Then go with the Cinegrey. Is it on a table or shelf mounted? Then you'd get a better experience out of the High Power.
As for Focupix, I never recommend a screen from a company that won't send me a sample. I'm finicky that way.