Tosh Qosmio G30-175???

Hi all, been mulling over options to get Vista onboard my notebook and I was wondering if I could enlist the knowledgeable masses to see which would be the best option, either to upgrade my present XP Mediacentre Edition to the most suitable version of Vista (help me name it too please) or indeed would I need to do a clean install???? Too many questions for this all too small box!!!! Help!!!! :confused:

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