I've said it once, and I'll say it again, a properly designed skeletonized tang is nothing to worry about. Not many Becker blades break (especially not since production moved to Kabar years back), and of the few that I have seen that do, its from a missed HT rather than the skeletonized tang. It is true that tapered tangs are neato though, and I'd not seen that knife before. Looks different

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OP, I'm playing a bit of devils advocate here, but I ALSO find that blades much over the 8-9in range rapidly get much more cumbersome to use for small knife tasks, particularly over time. Thats why personally I feel the BK9 is so good, not because its actually all that great of a chopper (its about middle of the road), but its one of the only "choppers" that I'd want to use on smaller tasks. Something to keep in mind.
Further muddying the water is the fact that there ARE lots of techniques to deal with longer blades length in tasks (grabbing the spine of the knife in your hand and using it like an ulu, sticking the tip of the knife into a log/tree to take the weight and make a fulcrum, etc), and then conversely there are ALSO ways to use smaller knives a bit more like larger ones (crossgrain batonning). What it really comes down to OP is just what you think you'll be doing MOST with the knife. Buy something thats best at that, and can be made to work with the other tasks you need if required.
The above reasons though are why so many people decide to get multiple knives/tools. The "chopping" task might actually best be done by an axe, tomahawk, machete, golok, or even a saw. Once that is taken care of, the job of picking out a companion knife gets a lot easier. My personal combo so far has been a Mora, BK9, and a folding saw, if that somehow helps you.
And Gaston, I personally don't get much vibration from my BK9. That "could" be because I use a loose-ish two or three finger grip and a moose style lanyard when I chop. That also helps with the effective length by an inch or two, which helps with the tip speed and thereby the effectiveness when chopping. I know you've used the BK9, but did you try the "choking back" method I'm describing? Just curious.