I dont really have enough for a Macbook Pro on my own, maybe soon with some of my parents money I'll be able to afford one. But before that point happens do you think its worth it getting a Macbook Pro for dealing with design like adobe photoshop/illustrator/drawing and uploading work into design programs as well as building applications for iOS devices (iPhone/iTouch/iPad) and Mac?

I really want to design the program part but everywhere I go people say you can build the programs on windows, but you cant publish unless you have a Mac. Is it true?

Btw I've never messed with Macs except for at my university and even then its rare since most CPU's there are XP (Windows).