I've used the Zipp 70's in the past, and didn't care for them, that much...the flat top was the only thing that it had going for it. I think that the reach is too short, which doesn't allow a smooth transition from bar to hood. The drop was too big and the curve too traditional for my liking. The XPLR version does look interesting (for my gravel bike), though.

As mentioned above, I'd add the 3T Superergo to the list. I'm a big fan...especially the carbon version, as it has a shorter drop and flatter corners (along with internal routing). I have the carbon on my road bike and the alloy on my gravel bike.
The alloy has a 77mm reach, 123mm drop. Carbon has a 119mm drop.