I'll have to sell off a few things first - and some kind of Intel Mac comes before any more collector's items.
While I totally understand you wanting to keep it stock, mine would def get some upgrades:
- G3
- CF or SSD
- 2x PCI riser and backshell
- Sonnet Tempo Trio or SATA
- ATI with DVD playback* and S-Video in
- DVD drive - Firewire/internal hack*
- MacOS 8.1 - 9.x
- USB 5.1 surround
* if there is some way of feeding the ATI's output back to the internal display