So you want an Emerson. I'm partial to the Commander, or mini cqc15.
Spydie lock backs will all have a tiny bit of play, its part of the design. (I'm not kidding, search the forum for more info)
Be prepared though, the spyderco rendition waves more freely than most Emersons, which personally I like as you won't wave out an Emerson unless you intend to unlike the delica I used.