Go for the Blackstone. Try for a lake view room. Rooms such as xx18 have multiple windows overlooking the lake and sun rises are like being at the ocean. Their restaurant, is a tapas format and is A+. The concierge lounge is good, usual breakfast type stuff but the dinners have the Latin style food from the restaurant. I had a black bean soup, golly it was great.
Previous to this stay at the Blackstone, I had been at the Wit and the Park Hyatt. I prefer the Blackstone with the lake view and being closer to the museums. Also there is a Trader's Joe not to far away if you want to hit cheaper eats (my room had a frig.) and want to picnic in the park.