That's the set I have. I bought it mostly because of the metal tubing and the Systainer to store it.
Some of the other sets just come in cardboard boxes. I did end up getting the brush that I think Festool calls "universal"? It is the one that is more pointed, kind of diamond shaped. There is an empty storage space for it in the insert. I have had the Wessel-Werk power head in my cart at Amazon for a while, but I just haven't pulled the trigger on it yet