I have the JVC RS40 but had many projectors before it.
I auditioned screen samples from da lite and other companies and decided on what was the best for me at the time.
Three or four projectors later I still have the same screen.
I auditioned the Dalite high power, da mat, cinema vision, Pearlescent, mat white and maybe a few others.
I auditioned from a few other companies as well but they either were more costly or did not look as good to my eyes.
Get the screen companies to send you samples and then try them out.
You can watch on a white wall for a while while you decide.
I went with the closest to a 1.0 rating and the widest viewing angle which was the cinema vision.
Your JVC is much more powerful than the first projectors I purchased so you can also try a few high contrast screens.
Joe Kane promotes a line for Da lite I would be interested in if I was upgrade my screen material.