I can't comment directly, but rather indirectly...my theater won't be ready for another 3-4 months. I will be using a microperf'd Ultramatte 150 screen (100" wide 16:9 format) coupled with a Sony G90. My previous theater featured an 84" StudioTek 130 (and an old Runco 930).
I have had to move forward based on faith and the opinions of others--I have no way of seeing my chosen combo before buying (used G90). However, I have heard from a number of well respected individuals on this forum that the Ultramatte is a good compromise to offset the microperf option--microperf'ing yields a 10% loss in light, which the jump from a 1.3 gain to a 1.5 almost offsets. If it helps at all, a number of people have informed me that the gain on most commercial movie screens (all perf'd, of course) is 1.5. Everyone has said that the Ultramatte has basically zero chance of hotspotting, whereas the Videomatte at 1.8 gain runs the risk of hotspotting.
Obviously, the StudioTek 130 1.3 gain is the BEST option. If you plan on microperf'ing or on having a screen that may be considered a wee bit too big for your projector (my case), the Ultramatte 150 1.5 gain is the 2nd best option. The Videomatte 200 1.8 gain is a distant 3rd.
Alex doesn't live here anymore