Fantom and Motif are both very nice. I have access to both also, and hear the difference.
However, each of those synths costs quite a bit more than the Ketron, and the original post made me think of the suggestion I made. It has some pretty good sounds for 'universal' use (as it pertains to his requested sounds).
Sadly, I don't own a Ketron.
I should change that.

Josie,
Yeah, that's one of Mac's very few published files you can still find. Sometimes people would challenge him to post something to prove his 'stuff' .. and I often thought of this demo. He usually deferred the request/challenge.
I admired him for not responding. Not sure how much of this crap played a part in his 'disappearance' of late, but if it did I understand totally.

I do not work here, but the benefits are still awesome
Make your sound your own!