Oceanic and All-Glass are considered the better grades of glass tanks. The problem is that the tanks you'll see in most places are all made by the same company but marketed under different names, and it's hard to determine if there is much difference between the different grades. For instance, my 40 is a cheaper grade, but I don't have distortion issues, the tank is solid and the sealant remains in good shape and attractive. Ditto for the 2 All-Glass 65's. The only tank we have the looks at all bad is a 15 high that is more than 20 years old--and if it's full, you can't see any scratches, just a few distortions around one corner.
I do prefer glass tanks for SW--you will have coralline algae growth on the sides, and I gaurantee that getting it off an acrylic tank without scratches is going to be a nightmare.
I do prefer glass tanks for SW--you will have coralline algae growth on the sides, and I gaurantee that getting it off an acrylic tank without scratches is going to be a nightmare.