Don't know about PLAY and Logic Pro. I know that the PLAY engine from EastWest has some issues with Protools.

Make sure you check out the Logic Forum and ask there:

http://logicprohelp.com/

Great group of guys there.


The link you provided is to the Quantum Leap Pianos that I mentioned above. It may sound better than Ivory, but I haven't used it myself. Ivory works well for me. It will also (no doubt) take up 40GB of storage for the samples.