Pro Quiet 2007
The Grishko Pro Quiet was designed specifically for professional dancers and is, as the name suggests, specially designed to be quiet. All I can say is, it works! But just because it has "2007" after the name, don't expect it to be a quiet version of the 2007. There are subtle but definite differences - the main one being that it feels slightly narrower and more tapered.
Some dancers don't like the "squishy" feel of the "quiet" platform (which is padded), which can make it difficult to feel the floor.