No brand to defend
A dealer sells the mechanism they carry, then asks the room to accommodate it. I start from the opening, the screen weight, the ceiling depth and the sight lines, and choose from whatever is genuinely built for that job — Auton, Nexus 21, Future Automation, Firgelli, Sonance and others.
Sometimes the right answer is a $900 actuator behind a plywood carcass. Sometimes it is a five-figure German ceiling lift. Either way you get the reasoning in writing, with the runner-up priced beside it.