I don't really like towered 1200 computers. To me, a cool case mod might be to saw a hole in the top of a computer desk, then dremell into the bottom of the 1200, and install the ATX PS, the mediator, the PCI cards etc, in such a way as to make it look like you still simply have an unmoded 1200 sitting on your desktop, but the real machine is actually below the desk's top!