For this type of enclosure you will want to use PVC board. It's $70.00 a sheet, but well worth it. Melamine is fine also, but it's not the greatest stuff to work with and it's really heavy. The laminate easily chips off when you're cutting it then it looks shabby. You definitely don't want to use wood or particle board. Considering the fact that you can buy nice enclosures for as little as $160.00 - $200.00, you're almost better off just buying them by the time you add up all of your material and hardware costs...