wood or ABS for effects?

ok so at 50 lbs an amp i'd be looking to make a rack with 1/2 inch ABS and double extrusion i.e. heavy duty, gator cases won't hold up unless the gear is stationary.
and if these are going to be moved i'd split them into racks of two rather then four, i'd rather move two 100 lbs racks then one 200 lbs rack!