Years ago, I bought a 92" diagonal Da-Lite Cosmopolitan for home use.
Cosmopolitan® Electrol®
It probably cost me around $800 plus another $100 or so for IR control (comes standard with a wall switch).
I've moved multiple times and attached it to multiple walls, used it 5 times a week for years and it still works perfectly. Mine is not tensioned but it still makes for a very nice steady picture.
There are cheaper motorized screens from places like monoprice that certainly look attractive.
For only $349.16 each when QTY 50+ purchased - Motorized Projection Screen (Somfy Motor) w/ RF Remote - Matte White Fabric (92 inch, 16:9)
If this were for home use, I would say, go with the monoprice. It may end up not being as high of quality but it will probably be fine.
However, in a work environment where installation is a PITA and you need reliability, I would probably recommend going with a Da-Lite screen and maybe calling them to get a good idea of the best one for your environment. The kind of screen, hi-power, matte, grey, etc can really determine the legibility of your presentations and frankly I don't know enough to recommend that part.
You may want to go with tensioned to minimize movement from air drafts (people moving around, opening/closing doors, etc). It will cost more but again, the point is usability and reliability.
One last point, business projection is usually in a 4/3 aspect ratio so a 16/9 screen may not be appropriate. The website projectorcentral.com is your friend for detailed answers to some of these questions.
hope this helps!