I think these are some great ideas. I eat whole foods whenever possible but I'm often on the road. My magic meal number is 350-400 calories as well - so it's great having some on the road "go to"s in mind. (It's pretty easy to make it work when I'm home cooking.)
Tonight's dinner - not a lot of cooking involved and all stuff on hand:
Chicken parmesan made with Schwan's Spicy Chicken Breast (190 calories), Barilla Sweet Peppers marinara (60) and a slice of light Swiss (50). Served over spinach sauteed with fresh herbs and more marinara (80).
This turned out really yummy.