I love the Tenacious, and I will be getting another one. It is the best Chinese-made knife I've ever seen. The build quality, the materials, the workmanship, accuracy of grinds, etc, are everything they should be on a Spyderco, regardless of where it was built. It takes a great edge, and holds it. I convexed the edge on the one I had, making it an even better slicer. It is a tough, heavy duty folder that locks up like a vault door.
I just got a Delica. I'm not convinced yet on the Emerson opener, but everything else about it I'm impressed with. Lighter, more compact and thin, it will probably work better in my office slacks than the Tenacious did.
I didn't sell that knife, btw. I lost it. A new one will be my next knife purchase.