Milton I have been very fortunate to have hunted both Alaska and Africa multiple times and either place is a life changeing event.
A Zebra hunt is a challenge, those that don't know better downplay it as shooting a horse. they are smart and tough animals and a worthy trophy. I used a custom built rifle on a Ruger tang safty action in 416 Taylor using a Swift 400gr A-Frame and wasn't overgunned.
When increasing your Parker collection buy the highest condition gun you can, you'll pay more now but in he long run it will appreciate more. I like the small bores myself but hey I'm an old fart