I'm also considering a switch from Windows XP to MacOS, and wanted the advice of the readers here.

I am part of a 3-man consulting partnership. We are all responsible for our own hardware, software, and email. I am currently using a Lenovo X61 with XP which will need replacing soon. The other two are on Windows Vista.

My work is:
- 50%, working with client data sets of up to 1 million records, and creating 100's of histograms, scatters, and other charts for every project. Currently using Excel and Access for this task.
- 25%, creating client reports and giant presentations (~150-200 slides). Currently using Powerpoint and Word.
- 15% email/task management/calendaring and web. Currently using MS Outlook against a hosted exchange account, and Firefox
- 5%, invoicing, bookkeeping, and business/personal finances. Currently using Quicken H&B
- 5%, helping the other partners with Windows and Powerpoint issues, often over the phone

I am considering switching to:
- Reduce the time I spend messing with my system (now about 1-2 hours/week)
- Get longer battery life and a lighter machine (I'm looking at the MBA)
- Replace Powerpoint with software better suited to my presentation-creation needs
- Get a better user experience

So, would you switch?