I use an old (old? 4years? shakes head) Thinkpad 380Z Laptop with a PII 300 and 96Mb. Does all I want. I use Cakewalk, XGworks and PowerTracks, none of which work on the Mac. (I also have Cubase but don't use it much). In conjunction with MidiYoke I can connect all these sequencers together and use them simultaneously. I mostly use it for driving my PSR-740 as it gives me access to the whole synth via XGworks. Best part was that it only cost US$400 which seems to be the going rate for this model. However, if I was using a soft synth it wouldn't be powerful enough.