Which Version of windows 7 to use?

Hi guys,

I recently switched to mac and want to run windows 7 via boot camp on the mac for my hog pc. So do I need the Home Premium, professional, or Ultimate version. I know it need to be the 32 bit version. I would like to get the Home version to save some money, but under the features I noticed the professional has a windows xp mode. I did not know if that would help the hog run better. Also has any one tried doing this with the mac with any success.

Thanks
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