I’m partial to Wera because of the Hex Plus geometry. I’m not sure if they still offer the Impaktor hex bits without the diamond coating. That may be a standard feature now. I could do without it.
Zephyr and Apex are high quality, but not impact rated and can be hard to source. That being said, I've beat on both without failure.
I like PB Swiss for hand use but wouldn't hammer on them.
Qualtool makes excellent bits, but they dont have hex power bits in their Qryptonite impact line.
I have a set of Bondhus balldriver power bits, but havent tried the standard hex.
Vega has some in their Impactech line but I haven't tried them after being disappointed with their regular bits.
I'm not really a fan of impact-rated torsion style bits in general. The only ones I can think of that I'd like to try is Vessel.
In a nutshell, to answer your question I'd recommend Wera. I've pounded on them pretty good.
