I have run in every version of the Zante, now in the Zante pursuit, and am also about 200 miles into a pair of Propels.
For me, the first Zante was the best, and the shoe has been less good since.nnthat first versions was light, had softer foam, secure fit, but roomy mesh around the toes.
Now the foam is pretty firm, and the all mesh new version is getting tough to secure my heel though still roomy in the toe. I'm using it for tempos and fartleks.
The Propel is softer, a bit springy. The fit for me is roomy (m11.5). Like many, I find heel lockdown a bit tougher, and am contemplating adding an upper eyelet to help. That said, if I snug down through my midfoot, it works fine. Cruising nice paces on my long runs with this shoe. Thinking I might get another pair, though the flite looks interesting as well.
Also planning on the Rebel.
Like you, I under pronate.
Good luck