I worked as a lab monitor in a college lab
full of dual 2.0 G5 towers and dual
21" CRT monitors for each station. We
had a lot of problems with hard drives,
strange permissions, and computers
burning out really fast. Most people don't
have these problems, but you have to
consider the use of the machines.
These were on 24 hours a day, 7 days a week,
with sleep mode being fairly rare. (video editors
know to turn sleep modes off!) These are also
networked into a larger network with logins
running through the school server, which gave
us the permissions problems.
It is a solid workstation, but not as fast as I
had hoped it would be for video editing. It
still did good, and if you take care of yours,
letting it sleep sometimes and turning it off
here and there, it will be a solid workstation
for your needs.