Can I just say...
You would need to buy MS Office
Why do people keep coming out with this bollocks? Unless you have a specific need for Exchange connectivity and Access databases, forget MS Office. NeoOffice, (OpenOffice with mac-specific tweaks) is perfectly capable of managing MS office document formats. And it costs nothing. Yes, it's free.
I've had Toshibas, Sonys etc. for years. Then bought a MacBook Pro last year. You can still use Windows on it, and the thought and functionality they've put into it is simply superb. I won't be going back to a 'conventional' laptop any time soon.