I agree with varying degrees with many of the ideas mentioned in this thread.
Liborio has one of the better of that kinda bread around town (especially good if combined with a trip to Gene n' Judes), but for that character of bread, I'd rather Freddy's. Still, I do very much like Liborio's friselle, very versatile!
Many of the coffee cakes at Oak Park Bakery are quite good, and I find better than Reuters generally. My only problem is, we (I mean as society) are not a coffee cake eating society anymore. I mean who "stops by". I keep telling my wife I want to start a daily minyan at Oak Park Temple so as to have an excuse to eat coffee cake. I also like their donuts and their paczki's are amongst the best period.
I'd say I used to be more enamored with Reuters. It's one of those places that I love in theory, a real old school, all purpose bakery. I just wish they'd use better ingredients. I mean they make a seasonal plum cake that's quite good.
On the other hand, no one's using better ingredients than Marion St. Cheese, and their pastries are about as good as they get. They are, by far, the best danish I know in the six county area.
A close second best to Marion St. in high quality pastries is the stuff made by the French Nuns with the mission on Chicago's west side. You can find their pastries at various markets including the winter markets Ann Fischer mentioned. For instance, they were at the market yesterday. You can also try calling them at 773-261-0101 to order some stuff (a bit of French would help here).
The problem I find with the Italian pastry places is one of freshness. Hit Palermo or Claudio or someplace else at the right time, and the stuff is exquisite, a day later and it's awful. The new guy at Claudio is talented, he just has real turnover problems.
Gosh I'm a fan of Kolatek, awesome prepared foods--go on Friday for the smoked fish! For Polish pastries, however, I'd rather go just a bit further to Cookie Monster's Delightful Pastries.
Think Yiddish, Dress British - Advice of Evil Ronnie to me.