I am a graphic artist by trade and compose as a hobby. I used to use Cubase VST on Mac OS 9 but upgraded my computer to OS X 10.3.8. I would like to get new software but everything seems to processor hungry for my machine. I haven't made music in 6 months because of the upgrade. I know I can run in classic but that sucks IMO. Heres the equyipment list. Please post suggestions for a good setup. I make electronic music FYI.

450Mhz G4 • 1GB of Ram
20G ATA HD 7200RPM, 20GB Maxtor 7200RPM. 40 GB Seagate Cheetah SCSI HD (320MB/Sec)
Atto ULD4
Audiophile 2496
Roland xp-50
KRK V6 Monitors
Yamaha Drum Machine
Yamaha Mic (2)
Lots of DJ equipment (thats where I get my love for music)

Please steer me in the right direction for equipment I have. Thanks!