Apple made two versions of the 2.3 GHz G5's. They made a dual processor version, and a dual core version. The dual core version is newer.
The dual core version uses PCIe cards, while the dual processor version uses PCI-X cards.
If you have PCI audio cards, they won't fit in the dual core version. It may also be hard to find new PCIe cards that have drivers for Power PC Macs.
Keep in mind also that the latest software may not be PPC compatible. Photoshop 5 doesn't work on PPC Macs, for example.
If you don't need card compatibility, and you have PPC compatible software, then these are great machines. $200 is a reasonable price now.
Real Macsters don't repair permissions.
Opinions are like toothbrushes. Everybody has one, so there's no need to share. - Red Green
I would strongly recommend a mac mini as new ones start at just over $500!
They are current and quick!
You might even find a good price on a used one !
I know MacDoc has some deals on the G5 and minis too!
As Rob said if you don't need extra hardware (or have what you need to add) and have all the software you need the price is tempting. I also asked this question a while back and was convinced by those on ehmac that the vintage PPC's are better left alone and invest in the intel based which might be why the PPC's are so cheap. You probably already know all the technical side of the choice and I assume you are just looking for opinions, if so mine is go with the pro, sorry I don't know what they sell for. I guess it depends on the specs.
Yes but there's something special about having a powermac G5 under your desk!
Yes there is, it nicely heats up your office in the winter. It doubles as a space heater.
No, not exaggerating. The big-ass aluminum box is pumping out the BTUs right now and the room thermostat is turned off. In the summer, I have to position it by a window so the loud fans aren't running all the time.
To which I can attest. I never thought I would say this but I do not really miss using my old G5 dualie. That the base model iMac I bought last August is nearly seven times as fast as that machine while consuming far less power and putting out nearly no heat still amazes me.
I just sold a dual 1.8, partly on the grounds that I already have three other computers, including a Cube (for sentimental/aesthetic reasons), and partly because I wasn't using it after finishing my audio file conversion project. If you take into account that the your software is permanently limited, the G5 is a perfectly sound machine. I believe the one you're referring to is the dual-core PCIe version; I've looked at the ad myself. By and large, they are steady, reliable machines. The first G5 I owned, a single processor 1.8, did throw A LOT of heat and was prone to sudden, violent fan surges. The dual I just sold was much better on those scores. You should be all right with the 2.3.
You should be able to find an early MacPro in the $800-1000 range.