I've gone through 2 pairs of Danner Pronghorns, loved them and still do. But wanted something just a tad lighter and went with the Danner Vital non-insulated this year. I've been hiking in them and couldn't be happier.
I'd say if you're a Pronghorn fan, go with the Vitals, they have a similar fit, maybe a tad more narrow feeling, but the ankle support is identical, IMO.