Not to turn this into a MacBash:
I've had no issues with 7 that I've not caused myself (overclocked my RAM too far). I hesitate to state it, but I think I've had less issues with 7 Pro 64bit than I had with my XP 32. Vista left a bad taste in many a mouth, but 7 was, an d is, a much better OS, in my opin. As for 8 (I know you didn't ask), the Jury is still out... I'd stick with a solid Win7, 64bit if you can manage.
“I like my iPod carrying cases the way I like my women: water-resistant, polyurethane, cheap, and easily stored.”
"Also, Vader is Luke's father, Snape kills Dumbledore, and Bruce Willis was dead the whole time