yeah i think its worthwhile.

personally i would stay away from any of the versions that are liquid cooled.

http://www.everymac.com/systems/apple/powermac_g5/faq/powermac-g5-liquid-cooling-info-leaks-issues.html

Sounds like the price is right.

They are a great looking machine, and you can still do 1080P you tubes, Its just the cpu's are going to sit at like 90% and the fan will kick on and sound like a jet taking off.

I think you could have alot of fun with such beast.