first of all..if us engineers can use it...us electrical anyways... there should be no problem running whatever business programs you need. and second of all...if i was you, dont bother using boot camp or parallels...those require you to BUY windows...use Crossover. This program lets u use windows programs w/o the windows!
I agree, I tested crossover at work. Very good... Parallels is even better, but just too expensive if it's only for that one app you really need. (1 XP license + Parallels= lots of money you won't be spending on beers) One problem I had in crossover was printing though, didn't look further into it, so there may be a solution, I just didn't bother...
On another note, if you want to use the mac for "business" I guess you mean mainly MS Office. I did find some odd compatibility issues between Powerpoint for mac and powerpoint for windows. Just so you know. Also, I would prefer Outlook to Entourage any day, but that's just my opinion.
I honestly - and I think I'm being very objective here as I use both Win and Mac very intensively at work and at home and like them both for different reasons - cannot think of a reason NOT to buy a mac, especially if you're "only" a "normal business user". Actually the only job I can think of that would require a windows-machine is if you're a windows developer... all other people will have all they need on the mac.
We all have some mac-whines, at least I do, but I will never go back to "Windows-only".
Things I miss on the mac: PuTTy, compatibility with my sony NetMD, my ViaMichelin GPS software,
Things I miss on the PC: iPhoto, twitterific, Geektool