There won't be any thrashing. Everyone is intitled to their opinion and both sides have valid arguments.
In terms of how they look. A lot of the "thick front of moldy lookin junk" can be offset by sloping your DSB
down in the front to minimize that. Also, I think a lot of people take the "Deep" part of a DSB
a little too far. I don't think you need 6" of sand in a fish tank. I have 3-4 inches, which only comes up over the plastic trim of my 55 by about 1 to 1-1/2 inches. I hardly even notice it.
The Eskimo's points on finding the cause is important. If you can't find a source for it then you can start thinking about filtration (LR
/Fuge). But you should first rule out the possability of an external source such as those listed by Eskimo.