Need some input. If you were wanting to convert your .40S&W to shoot 9mm, would you rather spend $165+ shipping for a brand new KKM drop-in barrel or $250-300 for a lightly used complete slide?? Pros and Cons of each would be great. For reference, I just got a new 23C, and am in the market to convert to shoot 9mm (as well as .357sig). There is a very nice complete G19 slide on here for a fair price, and I'm torn on what to do. Any input is appreciated. And, I will be posting pics of the new girl as soon as possible; in a new thread of coruse.