Well, you are welcome to your opinion, but I have been using Vista for 5 months on an HP Media Center m7690y with the E6400 processor and 2GB of Ram. It has the HP supplied upgrade to Vista Home Premium to replace the original XP Media Center Edition 2005 which was a bloated mess and was unstable. Looking back I blame Symantec's Norton's Internet Security 2007 for many of the problems.
After doing a clean install of Vista, it is just as fast and stable as my 4 year old HP D530 with XP Pro and P4 3.2 MHZ with 2 GB of Ram. In fact it boots within 5 seconds of it. It is the machine I use the most, and I use search all the time. Yes, most if not all the system adjustments are in different places, that just makes it different not bad. But, that is the reason I bought David Pogue's Vista Book to go along with the XP Pro book I bought 3 and 4 years ago (v.2 for SP2, and v1 for the orgininal XP Pro). I would rather look it up in a book rather than stumble around. The first of his series I bought was for Windows 2000 Pro.
I also have Vista as an OEM installation on a scratch built computer. It boots faster than any other machine I have. The third Vista machine I have is a new HP laptop that I spend a long time de-crapifying and setting up. When I got it, it was the slowest boot, but then I have pulled a lot off and haven't timed it yet.
I think if you go back and re-read my posts, I
NEVER accused anyone of not knowing what they are talking about. What I pointed out is that it is unfair to blame Microsoft and Vista for driver problems written by Nvidia for Nvidia graphics cards. I have the 8600 series card in my new machine and so far I have collected 5 different driver versions for it. That is Nvidia's fault, not MS. That does not mean the problems don't exist, just I believe the blame is misdirected.
As for Windows 2000 Pro - yes if you had read the Wikipedia article, it is in fact Windows NT 5.0 and XP is NT 5.1 and 5.2. They dropped the NT terminololy for various reasons. If you have the resources to keep it secure, it is a slimmed down lean OS with a very clean install. You must have missed the fact that it is what is on the PC on my desk at work. I have been using Win2K for 7 years. It is a functional OS, but rather bland which makes it fine for business use, but most consumers want something a little more pleasant to look at, hence XP and now Vista. But, Win2K is no longer supported which means that no more security updates are coming.
On the topic of the books, Pogues Windows 2000 Pro book is 444 pages, his Windows XP Pro SP2 book is 688 pages long and the Vista book is 828 pages.
As far as XP is concerned, if it works for you, stick with it. Vista works for me so I will go forward with it. If you wanted to install 2K on your Media Center, you
might even be able to do it as you could use XP drivers for most devices.