I have two that fit those description.
The first is one of the two knives in my pocket today, my brown G10 full sized Calypso. If you asked me my three favorite Sal designed folding knives, I'd obviously pick the Police 4 and Pacific Salt. Number three would be the Calypso.
To me the Calypso is a highly refined gentlemans carry. The handle is very rounded and ergonomic, with very few sharp points. It has a large, roomy grip behind the index choil that melts in my grip. It's one of the few knives that feels just as comfortable in the choil as it does behind it, something I can only say about maybe 3 knives I own.
I love the Calypso for its combination of amazing ergonomics, negative angled full flat grind leaf shaped blade, and how it's perfectly sized to my hands. I owned the Caly jr, 3, 3.5 and UKPK. Amazing ergonomics for such small knives, but I prefer larger handles with more room behind the choil.
Why don't I carry the full sized version often? Well I've rusted the liners on my VG10 Police 3, and I expect with regular EDC I'd do the same to the Calypso. With pinned scales, I can't clean it if so. I like the design but I'm nervous to carry it every day mainly for that reason. Being difficult to replace if I bang it up at work comes to mind too.
But I still love the design, and hesitate to trade it towards another Spyderco I may use more frequently.
The second knife on my list is the Szabo Folder.
This was one of those knives that I knew I had to have the first time I saw it. It's such a cool looking design!
The Szabo isn't all looks. It's another Spyderco like the Calypso, very good ergonomics using the choil or behind it. The handle is spacious and wide, perfect for larger hands.
Thw other things stand out to me with this design.
It's the only implementation of the compression lock with a self close like the lockbacks I love. I'm a big fan of the concept and would like to see it revisited.
The black blade sprint run has my favorite carbon fiber scales from the factory. They're gorgeous and grippy without being abrasive at all.
Wicked looks, excellent ergos, a unique lock and a nice negative blade angle recurve with splinter picker tip. So why does it mostly guard my collection instead of seeing pocket time? It's pretty heavy at 7oz (more than 2x Pacific Salts!) and while the self close is nice from a safe carry aspect, it makes it have stiff opening action. Use and liberal lubing has helped a lot, but it's still not as easy to open as my Pacific Salt and Police.
Even though it isn't as practical for me as a Pacific Salt, I think the Szabo folder is too cool and too unique among Spyderco designs to part ways with it.
