Powerbook G4/pro Tools/external Hard Drives, Newbie help Options

[jawnzap7]

First I just wanna say thanks to everybody on this site. I just joined but, have already learned a ton just from poking around. It seems as if everybody here is very patient, and informative...now that the requisite ass-kissing is over , lets get down to business...
So I just recieved my 15 inch Powerbook G4. It's a 1.67 Ghz model, with 2 Gb of Ram, and a 100 Gb 7200 rpm Hard Drive. I am currently awaiting my M Box2 (factory bundle) with Pro Tools, via UPS.
I have read the documentation on the digidesign website, and have read that it is strongly suggested to get an external/additional hard drive, instead of using the internal boot drive. But is it necessary? I got the larger internal drive hoping that it might be sufficient. If not I can live with that. I'll spend the money if I must.
So my next question is this...is pro tools compatible with usb 2.0 external Hard drives? Or can you ONLY use firewire/sata/whatever else they list drives. The usb 2.o's are cheaper for more storage than the firewire models. But I definently believe you get what you pay for.
And what about internal drives placed in shells? That seems to be the cheapest/most economical option, but I don't know nothing about that stuff. Is it hard to do?...what is my best strategy here?

[jawnzap7]

Thanks for the link. I'm definently now leaning towards building my own. It just seems alot more cost effective. Like I said previously, I don't know anything about how to go about doing so, but I assume the enclosure, and/or the hard drive will have the necessary info. I've read alot about unreliable models of hard drives(maxtor,lacie, etc.), but not alot about one's that people really trust. You mentioned seagate, what are some of the other brands I should look into. Is thier a website that has comparison reviews or anything like that. Even just brands would be helpful, and I could do the legwork myself.