I think you will find the Maxwells although good, are up there in price as well, if I remember right, is the same range as the Beattie screens, I am surprised your crown didn't have a fresnel, that is the oddity, most of the crowns were equipped from the factory with the ekatlite screen, but I have seen a few over the years that didn't if you have the orginal glass, anything you buy is going to be brighter, the orginal graphics screens were sandblasted and were not bright to begin with, and after years of accumulated dirt and enviormental contaminents they get quite dim, until you figure out how you want to go, you might just take yours out and wash with warm water and some mild dish detergent, that will help alot.
R.