I am also in the market for a screen, and like you, could really use some education on what to look for. For example...matte white...grey..glass beaded...what are the advantages of each type?
My needs are for an approximately 100 inch diagonal ceiling mounted screen to drop down in front of my current 61 inch Samsung TV for when I really want the cinema experience.
Main system: Thiel 3.6 L/R speakers, Pair of Velodyne F1500r subs, B&W HTM center, Emotiva and Polk RTi 28 surrounds, Integra DHC 9.9 pre/proc, Pair of Emotiva XPA-1's, Emotiva XPA-5, Threshold SA/4e, pair of Threshold S/200's, Oracle Delphi TT w Magnepan Unitrac 1 arm and Shure V15 - Vmr, Logitech Squeezebox Touch, Oppo BDP 83 optical disc player, Threshold T2 preamp, Denon DR-M44HX cassette, Pioneer CLD-97 Laserdisc. LG PF1500 led projector,Elite 100"tab tension-ed motorized screen.