Chairman moe, I think a model 14 is a great field knife. I have, used, a full tang with finger grip [the standard configuration] and it will handle the tough stuff. My 14 with a CDT feels lighter but really havn't used it near as much [mostly when walking and not cutting].The CDT will probably handle the tough stuff just as well but, when chopping, digging, or hacking through the bush, added "heft" in the knife can be advantageous. The finger grooves may not be the best for all around function, but when fatique sets in, the handle will not slip out of your hands. My CDT has the Border patrol grip and feels better to me. Now on the otherhand, a model 15 with a CDT is just the tickect for a comfortable carry knife. It is just a tad larger than the model 5 or 1, [5 or 6 inch blade] without being "bulky". The size of a model 15 would make a better "outdoor" knife but the 14 will make a better combat "field" knife IMO. Try to find someone with the two grip styles. The handles change the "feel" in the knife even though they are the same model.
To add some more confusion, I like the model 16 much better. There is a "special fighter" a cross between the model 16 dive knife, and a model 14. I have never handled a special fighter, but I think my buddy, Melvin Purvis has one. Try asking him or just wait I think he'll be happy to add some info. All the best.