Thanks for the replies.

The 457 jumped to mind right away, but I'm assuming it is to the 4513 what the 908 is to the 3913. I found my 908 to be (understandably) rough around the edges, and a little thicker than the 3913, but i think that was due to the slide being less beveled. Can the 457 front sight be changed? For some reason, I thought the 908 sight was a different design than the 3913.

I also think I would like it to be de-cock only, as opposed to the safety.

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Because of the metric system?