I'm building a DA Parlee Z5. Any thoughts on the DA headset versus Cane Creek or Chris King?

Thanks.

if by DA you mean dura ace, unless there is something new im not aware of (not likely ), shimano only makes (made) threaded headsets and wont work with your parlee.
chris king does not make headsets for frames like the z5. the z5 uses drop-in bearings, no cups. king's "inset" uses internal cups, it's not the same thing and wont work. so it's cane creek.

I wondered the same thing. I took a look at Parlee's website and they are indeed offering a Dura Ace headset with the Dura Ace Z5(Cane Creek for everything else I think). Did a quick search on the web and couldn't find any info about a Dura Ace drop in headset, so now I'm curious.

The headset that comes with the Z5 is perfect - my thoughts are no worries or need for something different

it was a typo.