[ubuntu] Best Installation Order? [Ubuntu/Windows Dual Boot]

I'm currently using Windows 7 64 Bit, but it's getting too slow so I want to switch to dual booting Ubuntu and Windows 7 (reinstalling Windows 7 as my current one is bit clogged).
Planning to split my 1TB drive into 2 500GB partitions with Ubuntu on one, Windows on the other.
Before I do just checking which is better, installing Windows first then Ubuntu or Ubuntu then Windows?
Cheers

Side note, would anyone recommend Xubuntu over Ubuntu? Seems like Xubuntu is designed for lightweight systems but mine is pretty powerful.

Source: http://ubuntuforums.org/showthread.php?t=1945640&goto=newpost

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