I still use my Atari Mega STE for editing some MIDI gear (namely, Korg Wavestation A/D,
Yamaha TG77, Roland D-50) through Steinberg Synthworks software. I find the Synthworks
series the most productive tool for sculpting up new sounds and for managing effectively
those synths - even better than SoundDiver and Galaxy Plus, which I use too.
used the Atari with Cubase 2 and 3 before switching to Mac and Cubase 4 - and by the way,
I completed the Cubase path through VST 5/32, SX, SX2 and SX3... but recently I switched
to Logic Pro :-)