Mk3 owner here.

I would recommend watching the blade thickness. My Becker BK10 blade with a 0.188" thick blade felt too heavy and too thick to be a good camp knife.

Due to work filters I'm limited in researching the thicknesses of the blades you listed. The best I can figure ... The Rant is 0.135", the SOG is 0.16", and the RAT-5 is 0.187".

My suggestion would be to go with the Benchmade Rant.

While the RAT may be a tough knife, I'd say that the Rant, with the thinner blade, will be a much better overall camp knife.

I don't care for the SOG blade or handle - not a fan of combo edges.

If you don't mind, I'm curious what it is about the Mk3 that you don't like ... price aside. I really like mine.

Ken