All I can say is that not having rimms on it scares the living daylights out of me. I am going to be moving here in a few years and hopefully wil have a place in which I can setup a large 90-120g tank, but im not sure if I am comfortable with not having rims on it. Granted it would be nice to have a rimmed tank with very small tight silicon seals I am thinking of maybe having the rims custom made of stainless steel, with maybe a minor gold inlay in places.
I just cant see the ability of the silicon seals holding up to the stress of the water pressure, i dont get the math on it.
Needless to say, it is a very nice looking piece of art for any room!