A vista laptop would make a great paperweight, but not too much more. I bought a brand new laptop, with great specs that I thought had hardware problems because it was just so bad, but it turns out that it was vista that made it almost unusable. I ended up dropping down to xp ultimate(by Johnny) / Ubuntu dual boot, and now it's an incredible machine that I never have a problem with. I don't have any experience with Windows 7, but I wouldn't touch vista with a ten foot pole wearing several pairs of surgical gloves under a hazmat suit.
nobody I know has had a good experience with vista either.