Stewart tends to be overpriced for what you get IMO. If you have some special applications or screen surface that your environment demands, then perhaps they will deliver a bit more than a Draper or DaLite screen will, but when it comes to fixed, permanently installed screens with a standard material, it is really tough to beat Carada.
The Carada 1.4 Brilliant white simply looks phenomenal and is ideal for most situations IMO. If you have a room that you will be using with controlled lighting, then that is the screen I would go with. The big three (Stewart, DaLite, and Draper) all have a product COST that is higher than the online delivered selling price of the Carada. Yet, review after review after review supports that Carada quality is pretty darn near the top.
With equally impressive customer service.