What say you check the power stability and heat generation of the 500watt machine at say, 90% of peak/sustained.
What are you talking about? Its extremely clear that any power supply is more efficient at higher loads than at lower loads. Thats pretty much a rule. And BTW, everything you listed would run quite nicely on the 600W power supply provided that it was of decent quality.
And why are you bringing up USB? How much power do you think a USB device uses? Its a few watts for each device, max. Your hard drives are probably not pushing 15watts each. Same for the burners. In other words, you're vastly overestimating your power draw. But then I would be too if I blew a wad of cash on a 1000W PSU. Gotta justify that spending somehow, right?
Dude, your advice is the one that has been bad...
Goo, educate yourself. You have no idea what you are talking about. I posted a review that quite clearly showed what the load power draw of a system with a Radeon 4850 was. Since you could not be bothered to even investigate that link, let me again tell you what the power draw was - 236 Watts. THAT IS A FULL QUAD-CORE TEST SYSTEM AT LOAD.
Your Newegg calculator is ridiclious. It is clearly out of date because it does not list anything that has come out in about the past two years. It also does not cite any specific tests. Its just a general marketing calculator, and a very old one at that.
What I'm asking of you, Goo, is to cite specific tests of systems with high-end gaming components and their power draws. If you cannot cite anything, then shut up.
Your PCI arguement is so daft that I don't even know how to engage it. First you start babbling about how PCI is an old technology. I have no idea if you're talking about just plain PCI or PCI-E, and I don't know why you're bring up PCI-E 1.0 because no one has been talking about it at all. So in other words, please make sense. Thanks a lot.