Here's another vote for "eat the quality you can afford".

As long as you're not noticing some kind of physical problems from the affordable quality, it's not worth getting a 2nd job just to afford the highest quality.

One reason I say that is that one thing that I can almost guarantee you will happen if you get the 2nd job in order to afford the highest quality version of everything you eat: working more hours means you're going to be more worn out at the end of the day, and have less time and energy to cook, which means more temptation to eat out (usually an even more expensive option), or you'll be tempted to just give up and eat junk because you're too tired at the end of the day to cook that lovely panda massaged meat.