I was in a similar situation a couple years ago - gearing up for a major hunt out West and had only East Coast-worthy glass and elderly gear at that. My rifle was up to the task, but glass was not and in fact, upon training for said hunt, the reticle in my old 3-9 detached and the scope became useless! I decided I did not want to be caught at the wrong time, wanting for that last $200 worth of performance out of my glass.
Ultimately, I decided on a Leica 2.5-10 EBR. Next to the Leica 10x42 Trinovid glasses, the Leica riflescope was the single best purchase for this trip as the only shooting opportunities that presented were at the very edges of shooting time and often in and out of shadow. The Leica scope is simple, no nonsense - the BDC reticle un-fussy and straightforward for .30-06 ballistics - non-illuminated, nothing to feed or fail. Leica is legendary for their cameras and lenses - the low-light performance made the difference in a filled tag and an empty bag. The shot I was presented was much shorter than I expected (a mere 35 yards) it was the Leica's performance in low-light/shadowed conditions at the edge of shooting time that allowed me to make an accurate viewing of the animal and place the shot precisely where it needed to go for a one and done delivery. Additionally, long glassing sessions during my week-long NM hunt with the 10x42s were never uncomfortable and I had the opportunity to compare with brand Swarovski 10x42 glasses. The Leica's were equal in every way and a few hundred dollars less for the same specs. Bottom line on the scope and glasses - would I buy them again again, yes. I paid less than $1000 from EuroOptic in 2017. The binos approx $1200.
Regarding Schmidt-Bender, I cannot say anything that will influence you more than if you send about 20 rounds your self from behind a Schmidt-Bender scope. I have a PMII 5-25 for my long-range .308 tactical rig and I have 100% confidence in this set up, daylight, low light, almost no-light. The glass clarity is as good as I have ever seen and or compared (admittedly, I've not shot US Optics, Hendsoldt or Elcan). Mechanically, it's without peer. It also costs more than I every thought I would pay for a riflescope. My Dad is surely rolling his eyes in his grave at me for it ("my Bushnell 4X killed more deer..."). It is build to be beaten, though I have not and do not intend to abuse it unnecessarily.
I've just been taken the opportunity to put together a light-weight, long range, mountain rifle in .300WM - a Kimber MA. I have purchased a Schmidt-Bender 3-12x42 Klassik for this set-up. The finished rifle will be just under 8lbs. I'm looking for this to go my West-country rig from here onward.
Best of luck with what you decide - there are many choices of course and at least as much advice, but this is a great place to get it!