Not being a smart alec, but I'd have to say that the most desirable straight production would be whichever underappreciated, and undersold, design was just discontinued because people "kept meaning to get one of those." (see here my disappointment at the discontinued status of the Massad Ayoob). And I don't think the Sebenza really counts as a straight production knife, not anyways in relation to companies like Buck, Spyderco, BM, and Camillus. Just a thought.
Sincerely,
Anthony