I'm gonna have to say the quad 7 Bareknuckle. It's a great looking design, and the KVT bearings make it a great manual flipper.
I've been a sub-framelock fan since KAI introduced it so that's a plus. And the standard model comes in 14C28N, which I've had nothing but positive experience with.
I actually carried my Bareknuckle today, but it was a little dressed up:
I've read that the detent is pretty stiff on the bareknuckle. Is that accurate in your experience?