So this is along the lines of what I'm thinking:
I'll move the 55g over to the desk, put the 40 in its place along side the 100g, both on cinder-blocks capped with double wide 2x6's. The long breeder will go on the far wall and I guess the other three smaller stay where they are. The 55g will not be connected to the rest so at this point I guess it'll just be the 100g, 40g, and 60g attached to the industrial filter.
Any problem with putting tanks on 2x6's supported by cinder-blocks? Weight not being an issue, should I pad the tanks somehow? The 40g is glass but the 100 and 60 are acrylic.