Well the R50 is only there because its the firm's dog about the house, so its in the spec below for much the same reason - it's filling in until I put something else there. The R50 still has the factory XP (2002), not one of my OS installs. I don't use it a lot so it shouldn't be in my spec below. My failing, in that respect. I'm going to put Firefox with NoScript on the R50 sometime soon since my attempt to have at least 1 Microsoft dedicated system running in the house has been a letdown thanks to Internet Explorer being such a pig integrated into the epitome of mediocrity, Microsoft NTFS. But at least I tried. And granted, an install of my XP OS would have gone halfway to improving matters, but then the dog would still be in the power of the pig. I cannot change that.
I also have three desktops running in the house at the moment (not counting my XP64), two have Intel D850GB server boards with rambus memory (all slots in use), and the third is an ASUS P5 with 945 chipset, 2 gb DDR ram, and 2 SATA HDD (150gb primary and 500gb slave). The D850 boards (Chrome on one, FF with NoScript, WOT, finjan, on the other) may not be able to run Windows 7 regardless, and the ASUS (Chrome) holds the multimedia catalogue so is really only there to stream music through the house 24 hours 7 days a week, when it is not streaming local television or web media. I use the ASUS most - only because its in the warmest part of the house. I should really acquire a more up to date system, but nothing has turned up that I particularly like, and I tend to trade off the more recent models because they make good sales, which in turn engenders good clientele, and likewise fosters good name. I mainly keep vintage for my own use, and since all have installed my XP Pro, they are quite adequate so far for anything that I might throw at them. And true, maybe not so with the dog.
Also true, I may need to buy new hardware to get the best out of Windows 7. But I intend to wait a while before I start with Win 7. There will most likely be some cheap Vistas around shortly, and I will certainly look to pick up one of them, plus I will wait on your reports concerning Win 7 before I actual take the plunge myself.