Don’t just take my word for it, many of your favorite tech sites are recommending you move to Microsoft Windows 7. I’ve been using the pre-release of Win7 for months now (yes I work at *that* company) and I fully support and recommend it to my friends and family members. Here is but one example of an article enumerating the reasons you should move to the Win7 OS.
My Win7 Desktop (yes, that’s a Tesla)
“Landing in stores October, Windows 7 is sparking a surprisingly heated debate (in our forums, at least) on whether or not upgrading from XP is a good idea. If you’re in the “nay” camp, we’re going to lay out seven reasons why you should consider switching your stance to “yay.”
When scanning our list, we politely encourage you to ask yourself, “Do I really want to continue using an eight-year-old operating system?” Followed by “Don’t I deserve better?” Because no matter how comfortable you are with XP, you do deserve an OS that’s both newer and better, and Windows 7 will deliver. Not convinced? Then read on.” Wired.com
The Bis Key Chronicles 
Updating a Microsoft OS also means updating the computer, expensive all the way around. So why spend the money when what I have works for me? Dad
If it works for you, then you are fine. But you aren’t nursing along a Win ME or dilapidated computer running XE either. Change when the time is right a go for Win7 over a Vista box.