Hi, I've been running Pro-Tools HD on my G4 867 for quite some time now, and I'm due an upgrade. However, I'm getting conflicting views from techs at the stores on what is best for me. Two issues. Firstly, the OS and drive set-up scenario. It was suggested by a enlightened tech at a post-production facility that I should have 3 internal drives - on the first have an 80Gig partition where I install the OS, on the second have an 80-250Gig partition where I install my applications and have a third internal drive for streaming audio. The concept is two fold - it is supposed to be faster, and secondly if something goes wrong I can always re-install my OS and be ready to roll again no time. Please understand, none of the above or what I am continuing to write is anything more than someones advice, and I haven't tried it yet, so I encourage you to give your knowledge and opinions on the matter so we can have an ultimate solution set! So....The discussion I had on the drive set-up scenario becomes strange if it is for a G5, seeing as the machine is only set up to hold 2 internal drives! Which leads me on too the guys at the computer store... One tech gave me a carbon copy opinion of the one I have just shared from the guy at the post facility. The other tech at the same place was a polar opposite. He said Panther HATES partitions and I should avoid them... he also said there was no speed benefit to having your applications running on one drive and the OS on another. My Second overall issue is this: to G5 or not to G5!!!!! Basically, I have a digidesign expansion chassis and an atto dual SCSI card, and from what I gather, there seems to be an extreem possibility that neither will work on a G5, so may be an upgrade to a dual 1.25 G4 would be a smoother and more obvious solution. Never mind the fact that the G5 will not fit in my ISO-Rack! Opinions!!!!! Thanks in advance. C.