If you are a student then you should definitely check this out. Microsoft has a special for students where you can get Windows 7 upgrade for $30. The normal upgrade price for Windows 7 is about $129 right now. Windows 7 is definitely a worth upgrade for laptops. So, get it if you are student! 🙂
By the way, you might also have access to the MSDNAA program, which has Windows 7 Professional available for free. You can check if your school and program is participating by searching on the MSDN school search page.