Windows 7 Question

[QWC]

If I build a new PC would it be ok to buy the OEM version of Windows 7 64 bit on Newegg for $100 or should I actually get the $190 box version?

 

[Emerald]

http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_install/how-exactly-does-windows-7-retail-vs-oem/fae7b2ab-c530-45e6-aeb3-cc55cf7b9231