I should add, about a simple reference with my experience, that with my w2k i never suffered any bluescreen or 'serious' error. With XP i've had already strange and sudden bluescreens or errors related with the registry, but funnily, never related with a logical action like a program recent installation, modification, registry fingering... etc. It simply is able to decide when to fuck you, like if you play on a fruit machine, unprecedented.
So, in stability, speed, reliability, confidence, security, logic, and output terms and actions, is it w2k what i recommend. on the contrary, if you want beauty, color and interface entertainment, driver compatibility, and if you treat it well, also speed, output, but without so stability/reliability as with win2k, then XP Pro is your choice.
Best regards.