@bloodline: Well, dude, you're obviously no Mac fan, and that's fine, there are PC people and Mac people but if you look at benchmark tests between G4s and 1Ghz era PC processors, the mac wins every time. I have never run Logic, always Digital Performer [just plain "Performer" before that] and it has always been a terrific system. I can run a full 24 tracks on a G4 AGP 500Mhz with few hiccups. Of course it was maxed out to a full 2GB of ram

As for garage band, no way is that "pro" but in terms of what it can do out of the box and for damn near free, it's pretty good software. I don't use it though. I actually use "Reason" for soft synths/sampling.
I have not checked out the FA series stuff, right now I'm trying to find an inexpensive Tascam DAW controller for cheap on ebay. I've been seeing the US-2400 for as low as $600... hmmmm
@Wilse: The usb on a mac for some reason is bloody slow. ever try to hook up a usb hard drive or disc burner? omg it's awful. let alone a usb flash drive, it always takes twice as long to copy files and even on my dual processor G5.
For MIDI it's fine and even some audio interfaces but for my money and time the firewire is faster and more reliable.