I agree with Alex that serrations are a pain to keep sharp- especially if you do something like hack through sheet metal with them (why do this with a knife?). Also, unless you are cutting a large amount of rope/webbing, I have never had an issue using a (sharp) plain edge for these tasks...
I'd recommend against the Kabar simply because it does not cut very well. These combat/utility knives have terrible edge geometry and emphasize toughness over cutting ability.
Some people like knives that do many things poorly (chop and split wood, dig holes, pry stuff, prepare food, fight drunks...) while others like multiple tools that do few things very well (a shovel for digging, a knife for cutting, an axe for chopping wood). The Kabar is in the former category.