And what about the 23
.
I agree with all what have been said above. 5-6, 28, 7. They're perfect.
I will also say that 2 blades are better. One for all-around and one for precise job (as skinning, meat working).
If only one knife, I find the 27 very appropriated (but it is personnal).
One thing I will also look at is the handle. Although I love the leather handle, in the field I prefer stag with finger grips. Less slippery and more resistant in wet conditions.
I've never used micarta so I can't talk about it.