My son has a very early 17'' intel one. It's a lot more versatile than a G5, you can do more on it.
It's ran really well with no issues since he got it, they are good machines. Display isn't quite a sharp as the best and I hate the mouse! ;0) Never hangs, crashes or plays up. Just works and does everything he wants it to do. Looks great too, very highly recomended.