Have a JD Smith and I like it very much. It's about the same size and shape as a Buck 110, with an equally thick blade, but much thinner handles. It feels very sturdy, but is half the weight of a 110, so it does not feel like a boat anchor in your pocket. Best of all it opens with typical Spyderco ease and smoothness and locks up like a bank vault. My only minor complaint is that it has no provision for a LH clip, but as the other two on your list are pretty much RH use only, this probably is not an issue for you.
Edited to add: You might also want to consider the C34 Jess Horn, another really sweet, dressy looking, micarta handled lock-back, and closer to the size of the Zowada and Centrofante than the Smith.