Windows 7/Aero/whatever "looking amazing" has little to do with my overall computing experience. I haven't seen my desktop wallpaper in six months. My taskbar is run on the right-hand side of the screen, resized so that only the "Start" icon is visible (no text), and right now there are 46 icons on it showing running programs. I like things simple, tight, and out of the way. Wasted screen real estate ranks up there with child molsters on the "things that piss me off" list. Aero may look cool, but like I said, the gee-whiz-bang stuff isn't for me. My Solaris desktops run xfce, nice and lightweight, super fast, no frills. All I'm saying is that, after nine years of use, I've got XP dialed back to where I want it, efficiency-wise, and now I've got to start all over again because every time Microsoft releases a new version of windows, the fundamental interactivity with the system changes 180 degrees.
Thanks for the suggestions of 2003 server and XP64. Will 2003 server handle the multiple cores like Vista/Win7 will? And I've heard bad things, overall, about XP64, mostly that its a kludge at best.