really porability verus speed...
audio files are huge... the PowerBooks HD is not that big. You can shove 4 HD's in the tower. But FireWire enternal drives are always a good option... you can work on a project one place.. and take it all to a studio on a portable drive... instant 120GB floppy!
-- I have an 80GB firewire Lacie D2
are you going to be doing long mix down and recording sessions... the powerfbook gets hot fast
-- Yep
Do you need more than one display... lots of Audio people do
-- Nope
The Tower will probably give you better proformace over all and more and more Audio apps are comming out for OS X and they are multi threaded (use 2 CPUs). But .. the powerbook is a very impressive presintation tool... are you going to be talking with clients? Showing off your work?
-- Not much
Do you need any spechal cards or interfaces? Like MOTU?
-- Yes, but it's USB
You will probably have to have several Dongles hanging off the back of it as well if you use things like Logic, Protools, Cubase, Reason, or Peak...
-- Only Logic uses a dongle out of that list
you will run out of USB ports on a pwerbook fast...
-- there's only 2 on the powermac... 2 on the powerbook ??
you will have to get a hub just for your dongles... you would have to do the same for you Tower.. but you can put in a PCI card to make things simpler. Many audio guys fill their PCI slots very quickly... you dont have any PCI slots on a pwerbook.
-- No need for pci with MOTU firewire interfaces
Audio Software and Hardware chage very fast... if you want to run a mini sudio.. I would go with the Tower... you have more room to grow. Then get the powerbook when you make a few $
-- Thanks... I guess.