Honestly, I stumbled onto Busse and Swamp Rat knives when looking for a good survival type knife and it just so happened that Scrap Yard was just about to release the S6. So initially I had to decide between the S6 and M6 and I went with the S6 because it was cheaper and I liked the idea of the Resiprene C grip better. Now I am hooked! I have bought and will continue to buy them to use them hard. If I don’t like a model I won't buy it because I don’t have any real interest in collecting them. I buy them because I can justify swinging a $139 quality piece of steel at hard objects but I wouldn't feel as comfortable swinging a $400 piece of a little better quality steel at hard objects.