Thanks for your very valuable input everyone.
I have researched and read much in the vein of kokopup's post and I needed to hear from PT day to day users on what they think and perhaps gain some reassurance. Which I have and I thank you.
I love the laptop I have now and have been loath to give it up but the time has come when I must. Not solely because of the screen failure a while ago - my solution is using an external monitor - but that plus just a 512mb ram and 40gb hard disk made my 'buy new' decision inevitable, and sooner rather than later.
As to Vista, I didn't have any choice in my buying area and price range, all come complete with Vista. I know Windows 7 is on its way but I wouldn't get it until it had been in use for a while and the bugs ironed out anyhow. And by then I hope to have saved up enough to get a Mac. :D
Thanks once again everyone. :D
p.s. If you are using Vista you may enjoy this website, it info, tips and ideas aplenty. :)
http://www.windowsvistamagazine.com/home.aspx