I've owned the CJB, Feather RG, RG Dx and the SS.
The CJB was an inexpensive way to try the system, but the QC wasn't there. Sold it.
The SS felt way to light and the tang is very thing. The feel was not what I was looking for. Sold it.
The RG is a good option in my opinion and the weight and feel is closer to a regular straight. Had one. Sold it and wish I had it back.
The Dx is what I have now and I love it. Heavier and built to last. Much better balance. I use the non-folding version and at some point I will add a folder.
I am a fan of the Kai mild blades.