I don't really want to get into an argument about Macs and PC's. I guess what you really need to do is:

a) choose the software that does what you need (you've done this step)

b) find out what platforms it runs on (I guess you've done this too - MacOS and Windows

c) determine the pros and cons of each platform for the product (E.G. Windows BIAB has more functional features than Mac BIAB - for now)

d) if there are differences then pick the one that suits you best, if there are no differences then:

e) find out which platform it works best on (probably the one it was initially developed on)

f) if there is no real difference in e) then look for the best price. Always bearing in mind that the cheapest thing you can do is always buy the best quality you can afford*.

*Here comes the argument bit - IMHO there is now no real difference in quality or hardware features between a modern Mac and any of the mid to high grade IBMC systems out there. Lets face it, the modern Mac is now an Intel box running a hacked version of unix. You're really getting the same hardware either way.

If you are likely to have a need or even a use for other software then the Windows platform gives you more choice.

--=-- My credo: If it's worth doing, it's worth overdoing - just ask my missus, she'll tell ya laugh --=--
You're only paranoid if you're wrong!