The Sng is likely the most popular, with a 3.5" blade-length. The SMF is much larger, with a 4" blade. Check for legal carry length in your state before you buy. GG (gunner-grips) give a great grip, but may be hard on your non-gloved hands and will be hard on your pants with the clip. The CC (concealed carry) are easy on you, and the LEGO grips are a nice compromise. I have seen special runs of CPM154 used in Striders sold by a good company (precursor to man that lives in trees), which you can find easily. I can't email you or PM so that's the best I can do. you can also find nice blades in stone-wash finish, tiger-stripe and digital camo, which is my favorite. These Sng's usually are $400. Good luck.
Sonny