I have been doing some research on this very topic for sometime now and reading labels and checking all the ingredients. It is not an easy choice by any means and I find myself a little sidelined by some ingredients like yeast extract and sesame seeds in feed like VitaKraft that are not necessarily, from what I understand, good for, or suggested, in feed for budgies. So, I have avoided the VitaKraft because of that even though I like the idea of the eggfood and probiotics, but I doubt they would like it very much. But I guess it isn't going to hurt them, just that yeast, for example, is not good for them and might encourage yeast growth in a bird.
That being said, I feed my birds Hagen Budgie Seed and they get a sprinkling of Harrison's High Potency Superfine on top of their seed with a bit of Ecotrition Herb Salad. The reason I can't switch them over totally to Harrison's is because they don't necessarily eat it, the stuff is expensive even though it is good for them, and I had NO results trying them on Zupreem Organic pellets. They literally refused Zupreem mainly because of smell (they are so fussy) and size and hardness of pellets. I tried grinding them but they are harder to break down then the Harrison's into a fine mulch.
I have also decided and started them on Hagen's Gourmet. Although, I seriously don't like the idea of food coloring in budgie food, there isn't much of it in there. I mix it with the regular Hagen's food and they are actually freaking out over it -- they love the gourmet. It has some extras in there that gives them more options and it's devoured every time I clean the old hulls off. They seem to like the dried fruit bits in there, too.
Volkman's, by the way, is comparable to Hagen's Budgie Seed, but a gourmet seed mix might be a better idea.
The way I see it, for my budgies, it's all seed, all the time. They own me. With the exception of Harrison's Superfine which they will nibble on with their seed. Seems to be the only pellet they don't mind and it smells good, is organic, and it tastes pretty good because I tasted it
Be wary of ingredients but if food is being wasted, it usually means you might want to introduce a different seed mix.
They love fresh dill (they go nuts for it), kale, lettuce, celery etc and sometimes apple but they are not always big on the fresh stuff.