Just an update for anyone interested in this topic.
The Wera bitholder is great, but it has more lateral play than the Wiha Centrofix or the Wiha RapidFix, leading to more runout.
The red Wiha Clickfix is for ONLY 1" bits, but works great. The dark grey Wiha Centrofix is a new replacement for the blue-colored Wiha RapidFix, which would hold only the longer powerbits; the new one will hold BOTH powerbits and 1" insert bits. The Wiha ClickFix doesn't work with all insert bits, however; for it to lock, the notch on the bit has to be deep enough (my Euro and most US bits work fine, but many Asian bits don't have a deep enough notch to lock in).
I just received a pair of the new CentroFix for my cordless drill/drivers, but I have been using the older Wera holder (with the knurled sleeve), the two new Wera holders (the green banded sleeves), and the two older Wiha holders. The Wiha holders will not let any powerbit wobble when it's locked in.
Here are pictures: