Most surprising high-end production knife: the Case/Bose Norfolk Wharncliffe. A timeless traditional design with that inimitable Tony Bose flair for flow and proportion, with excellent materials, construction and fit 'n' finish. This US-made mid-tech knife offers real custom-like quality that surpasses any production knife at its ~$275 price point in my experience.
Most surprising budget production knife: CRKT (Taiwan) Viele "Wasp" (small version). Solid ti handle, inset lock bar, Teflon plated clip, very decent AUS-118 blade steel, completely solid lockup, smooth action, above average F&F, nicely step-machined pivot, and dirt-cheap for this level of quality and materials (I paid under $40). Removing the G-10 scales improves both its ergos and pocket-ability.
Most disappointing: Emerson chisel-ground "tanto" CQC7 (made by Benchmade?) from the 1st production run. Boxy and uncomfortable, wobbly and very late lockup, relatively useless, easily chipped, trendy blade profile and edge geometry (for me, anyway, not to mention apparently being chisel-ground on the wrong side for a righty), and just dog ugly. Most disappointing hype-driven knife I've ever purchased.