Dark said:
I am more of a casual Photoshop User so thats not my main issue. However I do use Aperture just about every day. I do realize that the new chips are coming out soon(Woodcrest?)so that may hold me back.
Your G5 iMac is probably fairly comparable to my 1st Generation PowerMac (2003: 1.8GHz SP, with 1.5GB RAM).
I'm using Photoshop CS2 (I skipped CS1) and in general, I've been simply using iPhoto (with only JPEGs) instead of the more resource-intensive apps (Aperture, Adobe Bridge, Lightroom). Once I narrow down which particual composition/exposure I want, I then manually import the RAW version into CS2 to work on. For revision control, I've been loading everything in its own directory as per my structure, then directing iPhoto to import them into its. This does increase storage needs, but I only import JPEG's into iPhoto, so its not really bad.
In broadest terms, I don't really have any system performance problems, but I probably am unconciously working around some of them: I tend to shut down a lot of background stuff to make sure that my CPU is as free as possible. For example, shut down iTunes.
When I do hit a performance wall, it usually seems to be more related to disk access on an open/close more than needing the CPU to apply an effect. As such, I'd probably look to installing a Firewire-800 RAID to speed this part of the system up before adding more RAM.
FWIW, I don't think that my G5 meets minimum specs for Aperture (video card), so I've not bought it. I do have Bridge & Lightroom and have worked a little with Bridge, so as to do batch renaming work. I found it to be an incredibly slow "takes hours and hours" chore when working with long (thousands) file lists. My basic solution here was to avoid using Bridge except for when I must (file renames) and then breaking it down into smaller batches (just 100-200 files at a time). To a certain degree, this "too big to swallow" problem was an artifact of going on a long vacation and coming back with a huge amount of work.
For my next system, I'm inclined to go with a Mac Pro (tower) with an Aperature-recommended video card, but will probably wait until Adobe ships CS3.
-hh