Metatron: Im not planning on more then 100lbs of equip in it, and none of it is very expensive (unlike most of your equip im sure). The fiber board its constructed of is really tuff 1/2" stuff, it sheared 2 stainless screws w/out pre - drilling on test pieces, also the rails are bolted threw and threw with high grade steel 3/8" bolts, 8 per side, each capable of holding a lot of weight and distributing the load pretty well, and the whole thing is assembled with stainless brackets and bolts at every corner.
However if it seems like it cant handle the full load ill simply build a stainless frame and mount the rails to it inside and the stainless inside the case.
Mermaid, I got the rails off of ebay for cheap, they were left over from some dudes similar project, everything else is available at homedepot or I had in the house and can be had from there.
also, please leave suggestions if you have any, like i said its not finished! :-D
--thanks guys!