|from fact, xp runs smoother with less resources than vista does, while vista takes an awful lot to startup nevermind running the system alone, that is why its reccommended to have good accessories for vista|
i am a vista user myself, i've used windows98 for about 2 years, then xp for about 4 years and vista for about 2 years
but sometimes i wish i could go back to the 98 just for the feel of the old classic, thats why i've got the 98 classic skin on myne instead of the vista skin.
vista is also much more helpful when it comes to errors there are many ways to correct them, but in xp there seems just to be less of them.
so on the fly pretty much vista and xp are both good although i would prefer vista whenever asked, and forever asked.
as sum1 else has said above, depending on what you want vista for? enhanced gaming, or working, or just to browse the net...vista can be all in one of those things as it is for me, but you need high standerds to achieve all of them.
for gaming i suggest
9900GT Geforce video/graphics card
4gb video memory
600-700GB hard drive memory
for working and the net or presentations then i suggest
3800 Geforce video/graphics card
1gb video memory
300-400GB hard drive memory