I like the Chicago Symphony for most of the analog era, specifically Reiner and Martinon. The Gould/Stokowski/Ozawa recordings from around or after Martinon are superb to me, too. However, while I like several of Solti's early analog recordings with them; as time went on, I found their brass to be too overwhelming. I'm an amateur trumpet and euphonium player, but it's too much. Too muscular, with very little beauty. Unlike other orchestras, where I could identify the fine playing of certain principal players, Chicago just seemed like an anonymous, colorless glob. It seems to be partly Solti's doing...even after his departure. And obviously the hall.
I'd love to hear them under more acoustically favorable circumstances, but I just don't rank them as highly as other ensembles.