Well, as I've said other places, XP Pro 64bit rocks.
Definitely the best bang for ya buck that Micro$ux has come up with to date. Never did understand why they put so much money into developing an inferior OS(Vista), when they already had a winner that was MEGA popular. --Now, having said that, I'll say this. I alpha AND beta tested Longhorn. I'd have supported Longhorn. Unfortunately, far too much of what was Longhorn never made it into Vista. And far too much of what was NOT Longhorn did.--
I used Vista in both 32 and 64 bit editions. What a pain. User Account Control. YES !!!!, dangit, I want to do this! (Turned it off.)
And where EXACTLY DO I FIND <insert file or system process you couldn't find here>

I am not a stupid child...do not dumb-it-down and hide things from me or make it more trouble than it's worth to get where I need/want to be.
And drivers??.....oh lordy, don't even let me get started on that. And all the 32bit software that won't run at all on Vista 64bit?--unlike XP 64 bit with WOW...same thing, don't even get me started on that.
I could go on, but I won't. If you have a pc for ya kids, install Vista on that one. Dang sure they won't be able to change or adjust anything, lol. At least the copy of Vista you paid too much for won't go to total waste. But if ya want a system that is responsive to you and your needs, XP can't be beat.