I have a 6 1/2 inch HD windshield which it Lexan on my Ultra. I'm thinking of changing it to a 10 inch one. HD has the 10 inch Lexan one for about $115 and there is a guy that sells Acrylic 10 inch ones for about $30. Is the Lexan one worth that much more than the Acrylic ones? Will Acrylic be all I really need?