Thanks for narrowing the parameters! That helps a lot. Here are some ideas for places unlike what you might find in Chicago:
Caracas Arepas
93 1/2 E. 7th Street (between 1st and A)
-- I'm not sure there's a large Venezuelan population in Chicago, so this might be a NYC treat. I could probably eat the Guasacaca arepa every day for every meal and never tire of it. The yo-yos are pretty special too.
Veselka
2nd Avenue and 9th Street
-- This is an old-school Ukrainian restaurant from the days when the East Village (formerly known as the Lower East Side or East Side) was actually Ukrainian. I recommend getting a Meat Combination Plate. There's also a Veselka outpost in one of my favorite parks at 1st Avenue and 1st Street. You can watch the hipsters step off the F train and eat a pierogi at the same time.
The Cafe at 10th Street Baths
E. 10th Street, between 1st and A
-- The food is good here (I like the chicken cutlet and beet salad best), but this is mostly great because of the bathhouse/schvitz atmosphere. You can detox for a bit, grab a cutlet, detox more, and then go out on the town.
Dumpling House
118 Eldridge, between Canal and Broome
-- I used to not eat pork and now I just avoid it. But not here! Their pork dumplings (which are still, I think, $1) are pretty breathtaking.
Hummus Place
St. Mark's between 1st and A or MacDougal between W. 3rd and Bleecker
-- Not sure there are too many places in Chicago that specialize in different kinds of hummus. This place does. It's owned by Israelis.
I could probably suggest many other destinations, but these are good places for a potential grad student -- on the inexpensive side, but still satisfying.
By the way, Kennyz, I absolutely agree with your assessment of 'ino. It's one of my favorite places! If you find it too cramped, though, they have another outpost on the LES called 'inoteca at Rivington and Ludlow. A different crowd, but the same food in a larger space.
Hope that helps! Have fun on your trip, Carlos!
Artichoke