I'm going to give GPO a try (with a copy of Cubase SE) but I have two not-terribly-powerful computers at home and I don't know which one would work better.

Computer #1 is a Mac mini, Mac OS X 10.4 Tiger, 1.25GHz G4 with 1GB RAM.

Computer #2 is a Dell Latitude D505 laptop, Windows XP, with Intel Centrino 1.5GHz and 512MB RAM.

[Both machines have a FireWire port and I have an external 7,200 rpm ATA 40GB Firewire drive for recording onto.]

Can anybody predict (from actual experience) which system will give me better performance for software instruments, MIDI sequencing and possibly audio recording?