What is so hard about cleaning them?
I think I may end up building my own tank and acrylic certainly seems the cheaper choice. I'm still not done researching but it appears that that the acrylic needed to build a 120 is around $250 (cell cast 1/2" thick) and the glass needed for a 120 I priced it at $600 (low iron glass).
I relish in the whole DIY stuff so building my own is almost a prerequisite but I'm still of the fence as to what material to use.
Micah