+1 for exploring other choices. They will take a beating and will last in pretty much any situation, but if you don't need that durability in your packed meals, opt for something else. The sodium content wasn't really what got to me... just the makeup of the meals aren't the healthiest. Taste wise, I never had an MRE that I couldn't at least somewhat enjoy (yes, even the omelette), but they just aren't healthy choices. Like the others mentioned, some random ones pack M&M's or Skittles. Suprise suprise.
Beer Jerky, dried fruit and nuts mixed together makes for a portable great meal that can make it through some good hiking or whatnot.