I currently have a 9 and a 11. It's time to expand my collection of beckers and I'm torn between which I should add. The 4 would be useful for trail clearing on the farm, but is it better than my current 9 is. The 5 would be used for food prep and game processing. It just looks so slicey. Until I handle one I'm not sure what other purposes I would use either for. For those that have used these which would you add and why. This forum is why I bought the 9 and the advise and knowledge given on here is outstanding. Plus the man himself posts regularly and seems very interactive with those of us that choose to purchase his product. Outstanding customer service wins me over every time.