OK, who has suggestions for pre-built, ready to go, grow beds and media?

I found these:
http://www.grotek.net/products/guide/pr ... floodtable
Looks to be about $140 for a 4'X8'.

I'm also looking into expanded shale. They heat the stuff until it puffs up. Very light weight at around 55#/cubic foot. Soaks up water and sinks. Cheap. Local to me is this product:
http://www.norliteagg.com/