Emax

I apologize if this has been covered before, but I just can't find a specific answer after searching the posts. Got this Emax Rack SE, HD with SD 1.2 disks.  Wondered what the best older mac to do the job was? I can get Pluses, SEs, Classics, PowerPC, and G4s all day just wanted to pick the right one for the job. Any advice would be greatly appreciated. I would be running this via serial not MIDI. 

Also came with the following preset disks if anyone looking for a copy of one of these:

SoundDesigner  E-mu Emax Version 1.12 Backup Disk
SoundDesigner Sound Files
SoundDesigner  E-mu Emax Version 1.12 Master Disk
Mariba/Vibes ZD710
ARCO STRINGS ZD836
COMBINED STRINGS ZD833
ARCO STRINGS ZD701
GRAND PIANO ZD700
ELECTIC PIANO ZD773
GRAND PIANO ZD735
CHIME VIBES and MALLET BELLS ZD755
DOUBLE GRAND ZD793A
Dulcimer/Koto/chimes ZD771
Rock Guitar ZD709
Electric Bass ZD736
Olympic Bass and Drums ZD756
Rock Organ ZD703
MIDI STRINGS ZD790A
KYODAI SYNTH COLLAGE ZD708
JASON 13 ZD738
COURTYARD ENSEMBLE ZD788A
SE EXTRAVAGANZA ZD855
MIXED CHORUS ZD707
ROCK KIT ZD702
CONGA ZD740
SOLO WOODWINDS ZD851
SOLO BRASS ZD822
FRENCH HORN ZD705