As an MS certified engineer and trainer (which I would never admit on my CV) I'd say get a Mac. Vista is a !!!!, and Microsoft have a lot to answer for in the way they've made the "update culture" an accepted state of affairs. If you can't use OSX you should really consider putting your computer back in its box and sending it back to the manufacturer.
I really don't understand the vinegar-stroke excitement over operating systems these days. They become more and more irrelevant by the day. Chrome OS and similar are the future in my opinion. Most people spend their life on the web and don't need bloated !!!!e like Windows eating up their system resources.