"easier" is a pretty subjective term.
With a soundbar, all speakers and electronics (except perhaps a sub) are in one box generally placed under the TV.
With a 3.1 system, you've got three separate speakers and a receiver to contend with. ...not to mention s sub if you so choose.
Now, as for sound, I would prefer the 3.1 approach but if "easier" is your goal, well then...