Yea, tanks that are mass produced seem to be slipping in terms of quality. I think its because people want cheap tanks and they don't know how to tell the difference between tanks that are made cheaply and ones that aren't. At the fish store I used to work we sold Lee-Mar and AGA, Oceanic; the AGA and Oceanic tanks were cheaper than the Lee-Mar, but they were made terribly. Its the little things that seem to make the difference, 1/2" glass instead of 3/8", perfectly lined up edges, edge polishing and diamond edging v. leaving the edge so it looks like it did when it was scoured, nice clean silicon work. I would point this stuff out to customers, but they wouldn't want to pay for it. AGE makes some awesome tanks, I saw a 180 gallon from them made from Starphire and it didn't have any bracing, totally rimless. I have seen this done with smaller tanks, but to be able to do that with a 180 gallon takes some work. Although from the quotes people are getting you pay a premium for the good stuff, just like everything else in this hobby.