I thought I'd share my experience here as a "newer" collector. I've found that in order to really appreciate my more expensive knives (and I do own some expensive ones), I've had to own and use all the various "tiers" before. Your Kunwu is a great place to start, but a jump to a Eustler or Rob Johnsons is a big one.
Your money is yours (and we'll be happy to help you spend it

), so take everything we say as the mere opinions they are, but here's my 2 cents:
Keep enjoying your Pulsar, but start surfing the exchange here. You can find high end offerings commonly from 75% to 50% of MSRP, and unless you have a specific reason to buy new, getting even light users here is a great way to start (heck, I hardly ever buy anything new).
The knives you list are all in the
extremely high end reach of production knives. I recommend going for an intermediary (or a few) to bridge the gap and let yourself learn what
you value in a knife. It takes a little bit to acquire the feel for what true quality is and what quality you appreciate. When I started the hobby I couldn't have told the difference between a WE and a Reate and a Bestech made knife, and now I could probably do it with my eyes closed. Kunwu makes great knives, but check out a Reate (or Reate made) for the next step up in premium Chinese manufacturing. Or if you want to go even more expensive, pick up a preowned CKF or Shirogorov. You can find Shiro F3s, Neon NLs, Quantum NLs, and sometimes the occasional Quantum for under $700 (or around $500 in the case of the NLs), and that will give you a taste of true premium knife production. Or even look for an Arno Bernard iMamba.
Correct me if I'm wrong guys, but in my experience there's not many knives better made with better action than a Shiro, and they're
relatively available here on the exchange.
In summary, my opinion is that you should get some intermediary knives and let your hands learn what they like, so to speak, so you'll actually appreciate the money spent (I enjoy a high end knife way more than I used to). Other than that, I have nothing against you dropping 1K on a Eustler. Actually, I got the itch for the Machinewise Sonora, so I sold off a few and jumped in on the preorder.