I would definatley keep working with Logic until you master it, i havent listended more than on the website to it but i think its sounds better than any motif. Since it has gigabytes of multisampled sound other than a few hundred of megabytes compared to the motif.
And the price compared to the motif....
Sample more, and learn to use logic and you have the best there is (?).
thanks... I was thinking i should just get Kontakt 3 for more sounds to use in logic 8 when i get my new souped up mac. I think those options give me more sounds and sound shaping opps. Which really interest me more than anything.....