i have always been a pc user but i really want to get a mac, my issue is i need a laptop that i can use to give presentations using powerpoint. i already have a presentation that i must stick with, so my questions are 1. how much trouble would it be to be able to use a current powerpoint presentation on a new power book. 2. what kind of problems will i have traveling to different locations using powerpoint projectors that are mostly set up for pc's(like plugging in sound and video) and finally and most importantly i know that mac costs a bit more than a pc laptop, so how much extras will i have to buy to make everything work. if it costs two or three times as much as a pc laptop i think my switch to mac will have to wait. any help or advice would be most appreciated. thanks