I wouldn't suggest specifically going to Evanston for anything food related, however, if you happen to be here already, there are very good burgers at the Celtic Knot on Church St. They are just "regular" burgers, not like the Kuma's burgers described above, but they are done very well. Always done exactly to our specifications with great taste and texture.
Moving down to River North soon...can't wait to be in the city and have easier access to a lot more (and better) restaurants.