Stop what? Telling the truth? Stating actual facts rather than opinions with no basis?
No matter how much RAM he has it won't alter the single engine G5. Based on things you say you honestly don't get how hardware works. No offense to you at all but it's true.
Bottom line is that he wanted a G5 and got one. It's one of the more reliable of the G5 towers at least. More RAM or 7200 SATA drives or not though it won't be able to keep up with your MDD or even a dual 1 GHz.
You are wrong again. But I'm not here to fight again.