Their are way too many unanswered questions to give you any advice on a screen. Wait until you get the projector and experiment on a blank wall, hang a sheet or any thing you can use temporally. Room conditions as in the amount of controlled light as in ambient or reflected is the most difficult to deal with. Screen size and throw distance are also a big factor. Personal preference is the biggest factor and is why experimenting is the best way to find out the projectors limitations so give it a good amount of time until you get used to it as at first it will look huge compared to a TV but most regret that they didn't go bigger after its too late.
"Smart enough to know better, to old to care" ------ Dedicated Bat Cave Home Theater, JVC RS49U/Mitsubishi HC7900DW Projector, 110" 16:9 Jamestown screen with variable power masking for CIW 2.50:1 to 16:9, Marantz 7009 with 7.1.4 Atmos with Ohm mains,3 DIY Subs (2 15" (1 ported, 1 sealed and a 12" 4th order bandpass), 1 DIY butt kicker, Custom Built HTPC, 18TB DroboFS NAS