Pet food stores are, for the most part, arranged by quality. You will find the high quality foods like Orijen, Taste of the Wild, Fromm etc in the front or first few isles. The quality decreases until you get to the back of the store where you will find Purina, Iams and Eukanuba.
Just wanted to say this is NOT at all true at my local pet stores, including the one I work at. The foods are completely randomly placed in terms of quality. Ironically, Eukanuba is right in the front. Heh.
I would not feed Eukanuba. Lotta fillers, not much meat, and way pricey for the quality. That said, I'd wait a month or so for the puppy to settle in before switching the food. I'd personally find something grain free or containing healthier grains (NO corn, wheat, soy). Maybe go to your local pet store, write down a bunch of brands they sell, and check 'em later on Dogfoodadvisor?
I currently feed Taste of the Wild, bison formula. It's a well-rated grain free food, recommended to me by many people. My dog does fantastic on it! It's also affordable, which is (unfortunately) important for a broke college kid.