Oak Park on the border.
I'm into Rainbow fish mainly. I like picking ones out from the assorted rainbow fish section. There are some great deals when you can buy a $14.00-$20.00 fish for 8 bucks. My favorite fish stores are Oak Park Natural, owned by Scott. Tropiquatics in Lombard is pretty nice too. Living Reef up on Addison. And Old Town.
Would like to send a thumbs up to Petco in River Forest. They really did a nice job on their tanks. I have never seen them look so good, and, they had a product I was looking for that no one else had. A phosphate test kit.