Don't do that mate. Just get one Macbook Pro.
That G4 is slooooowwwwwww and wont be up for the job if you want to work with Adobe creative suites and the like.
You're better of spending the money on one good rig instead of two crappy ones.
The little asus is apparently really fast. Also both of those with all of that stuff plus like 2 games is less than the MBPs price with a few things
Also the G4 is for rendering while i do other stuff on the laptop and to learn the ways of osx and moreso a learning machine. The g4s are about 300 bucks or less on ebay.
Ebay Link
I can install OSX (my dads K-12 school staff discount gets him it for 60 bucks) and a compatible Wifi card (compatible one is 30 bucks there are lists online) for less than 300 total price.
I'll probably only render while im gone or over night if i want to do something else on a laptop and to play with other various things.
What would you suggest.... Intel imac or something or if you would suggest an old powerbook or something then suggest that.
Keep in mind the lappy im looking at performs better graphicly that MBP but if you really reccomend MBP stick with it