M_Boats: Cockpit Canopy

We want to get a cockpit canopy made, or make one ourselves. I have pored over various pictures of M-boat gatherings looking at the different setups. I think some stiff battens or PVC conduit will work across each end, and a lift loop in the centre for the halyard. I have a real nice picture of what I recall is Larry Yake's "Corn Dog" at anchor. Question is what fabrics have people used, or like. Choices are Sunbrella (or similar) or Nylon. Sunbrella fabric gives very good shade. Not sure how bulky it would be to stow. Nylon, depending on the weight, may give some glare, but will roll up very compactly. Opinions anyone? Thanks. Bill