I (and Mainesail) recommend Makrolon AR-2 (a polycarbonate) over any vinyl, including Stratoglas. It offers much better clarity and I think, durability. I use it on my dodger. The two "downsides" are it is more expensive and you cannot roll it up. The front panel of my dodger zips up for ventilation and folds back onto the top of the dodger and is held in place by a standard SS twist lock canvas fastener. Regardless, whether you use vinyl/Stratoglas or polycarbonate, use Sunbrella sun covers over the windows when not sailing to prolong their life.
UPDATE/Edit: just found my old estimate and the material I have is:
60 gauge Lexan MR-10 Polycarbonate window