Custom stand strength... ?

[doch]

OK... I'm going to be building a custom stand for my new 160 (48" x 30" foot print) and although I'm fairly confident that I'll build a strong enough stand, I'd like a little reasurance. I'm thinking 2 2x4's perpidicular to each other on each corner, with 2x4's around the edges up top, and likely a couple of extra 2x4's across the top inside the perimiter. On top of that, probably 3/4" plywood and then 1-2" styro foam on top of that. I'd like to throw an Ikea cupboard in the middle which when planned correctly, can also be used as supprt for the center of the tank. I may also put another couple of 2x4's vertically in the center area for good measure.

To me, this all sounds good... maybe even a little like over kill... what do you think?