Do I really need a swap file

[kubuntu]

Hi all,
I am building a new machine and am thinking about disc layout and would 
like your thought on the following:-
1	I will have 32GB memory so do I need a swap file?
2	I will be dual booting with windows 7 and wish to play my music mp3 
files in both operating environments.  Would it be best to have the mp3 
files on a ntfs formated disc and then mount the disc on both systems.

Thank you for any help
Paul
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