WildCowboy said:
It always amazes me how people talk about $500 like it's nothing around here, particularly when it's not their money. His parents want something for internet, Office, and Quickbooks. That's about as basic usage as you can get. They already have a monitor/keyboard/mouse that they can likely use for a Mac mini.
And then everybody jumps in and says "Hey, buy something twice as expensive!"
It's like somebody trying to decide between a Corolla and a Civic, and everybody jumps in and says "You should get a BMW 3-series! You'll love it!" While their statement is quite possibly true, the value of the extra money spent in light of the person's needs is all likelihood just not there.
You can do a lot with $500.
Well said - I was thinking the exact same thing.
That being said, the one thing I would double-check before you buy them the Mac Mini is that they definitely want a desktop replacement.
My parents were in the market for a new computer about a year-and-a-half ago, and I ended up getting them an iBook (transitioning from an old Windows 98 desktop). I also set them up with wireless internet in the house.
Now, they can't imagine having a desktop computer - they love the flexibility of moving the laptop around the living room, kitchen, etc.
Not trying to suggest you automatically spend more money, but simply that you double-check the desktop vs. laptop question before purchasing.
Refurbished G4 iBooks are ~$700 on the Apple website; of course, with the rumored impending release of the iBook replacement, the price might get even cheaper.
If you decide on the desktop, here's another vote for the Mac Mini - I think it will meet all their needs!