I had horrible experiences growing up with macs. The ones we had in school (we only had macs... all the pcs were in the science labs and no one was aloud to use them unless it was during class) were truely horrible. They crashed constantly. They would get bogged down if you opened up more than one program.
All this time, I urged my family to only buy PCs. They're stuck on them now, afraid to try anything new. They just recently (about a year ago) bought this POS dell for about $400 and is basically unusable. I can run photoshop, firefox, trillian at once, but both my photoshop and illustrator programs are corrupted since install. While the computer was cheap and easy, its still a POS that just kind of sits here and doesn't do anything worth while.
For a good mac, it might cost you a bit more than your regular PC, buw what you're getting is stability, cleanliness, and a lack of all the extra crap that you get in a pc. You don't have to get scared poking around in all of the folders on a mac.
You can have 10 different programs open on a mac and switch between them seamlessly. They run in the background when not in use, so they don't take up all of your memory and processing power, like a pc would.
Anywho, I'd suggest taking a look at what you need. Do you want an investment? Or just another computer to take up the general daily needs that will probably need to be replaced in a year or two?
If you want an investment, go with a Mac. They're super easy to learn, and they look pretty. Go to your local mac store and just sit down and play with one. Don't even bother with the salesman for your first try.
I'm not even sure I was any help... Its a bit early for coherrent thoughts... But I tried