I like glass. I actually went to a glass shop. I have a 20gal high aquarium. I got glass cut to 23 3/16in long and 9in wide 1/4in thick, with what they called a knock down edge, so it wouldn't be sharp. It was about $9. I have about an inch in front that I drop the food into, and the space in the back is for the filter. Works great, and was inexpensive. My light is right above the glass.
Having a glass place near by is great. When I used to live in NY you could find anything and I used to go have it made exactly as I wanted because I can't stand the regular tank covers but here in my area of S.FLorida there are none to be found so tried polycarbonate tops and love it but it would be nice to have glass place.