[frenchman]

When I decided to install OSX on my 450 AGP G4, I did four things :
1- installed a second HD running at 7.2k for that, much much faster than the original 5.4k disk, which I keep running with a fully operational OS9-PT5.1.1 system just in case.
2- Sonnet 1.2GHz Cpu upgrade (fantastic boost)
3- change to a compatible and digi qualified ATI Radeon graphic adapter
4- added some extra RAM to go over 1 Gb

I have an unsuported SBS13slot chassis with all my 7 mix cards in it, and I run Panther 10.3.2 (NOT 10.3.3) with PT 6.2.3, a combination that is unsupported as you know for mix systems. So I have a few strange things like one of my hardware interfaces showing up in the wrong place in the hardware setup, and I need a ouple times a day to quit and reload Pro Tools (very fast under OSX) if I open and close many sessions with certain plugins, but overall everything works fine.
Although I run only TDM plugs, I can even run a native CPU hog like the HTDM altiverb in low latency mode with no problem
My main reason for choosing to boost the present machine was to maintain a solid "good'ol" OS9 config with most plugins authorised on disk to cover my backside while managing the migration (with all plug !)to OSX.
Good luck
Mark