Both the M57 and M58 are great Smiths. Personally, I like the M58, but I am a sucker for fixed sight Smiths. Just like the clean look of them. If it were me, I would look for the best deal on either the M57 or the M58. While both are getting relatively hard to find, the M58 is the more difficult one to find, in my opinion. I have both the M57 and the M58, as stated earlier, my favorite is the M58.