I have one Crown, one Shield, several Harps (and in two plastics), a few Pures, and some Challengers.
I tried the Shield after watching JohnE McCray wear out a course with his Shield. I didn't expect to duplicate his abilities, but thought I'd try a Shield anyway. The Shield felt okay, but was turning over on me on throws off the tee. Didn't know if mine was an aberration or if that was normal for that disc, and I haven't tried another one.
The Crown felt okay in the hand, and I might give it another go as a putting putter. But from my initial tests with it, I don't recall it being exceptional at anything...
I've discussed the Pure and Challenger elsewhere; both are really good discs. Challenger will fade more. The Pure is right-down-Broadway straight.
The Harp is an approach disc for me. I only putt with it when the wind is beating my face. (And it is good for that.)