As some of you on here know, I have a PowerMac G5 Quad and am very happy about it. VERY. What I was wondering though (especially in light of newer deices becoming more and more powerful and more energy efficient), is if I should be considering a different machine or if my energy use is actually negligible. If it's not negligible and using my Quad is doing terrible things to my electric bill, then keeping this might not be financially wise. Any ideas? I still like the ability to upgrade hardware and make other modifications in the future, but that's less important than a powerful yet energy efficient machine that might outperform my machine. Thanks in advance for any advice!