For the sake of completeness … I should add a few more that are either further away or not in the same value range in the Chicago area but may be of interest for someone that was closer and is reading this thread. They are …
https://www.roomandboard.com/catalog/bedroom/randb-mattresses Retail direct outlet in Chicago. Their mattresses are made by Restwell in Minnesota but the quality/value is not in the same range as what I’ve already listed in post #2.
https://www.northshorebedding.com/ in Northbrook, IL that carries Savvy Rest, OMI, SleepTek and Suite Sleep which are all high quality latex mattresses (including both Talalay and Dunlop) with good customizing options but are in a more premium price range.
Shop Affordable Home Furnishings & Home Goods - IKEA Bolingbrook and Schaumburg, IL. See post #3 here for more about their mattresses.
Retailer in Downers Grove (23), Orland Park (27), Schaumberg (31), Lincolnshire (31), Naperville (34), IL. and Greenfield, Brookfield, Menomonee Falls, WI. They carry mattresses made by Claire Bedding which is a wholesale mattress manufacturer in Escanabe, MI who are a Restonic licensee and also make their own line called Platinum Dreams which are very nice and include several 2 sided all latex mattresses and others. In my conversations with both Clare bedding and Pennymustard I have found them to be open and helpful about their mattresses and they are good people. Of course each of the pennymustard outlets may have different people but I would suspect that they would all be higher quality salespeople that are more knowledgeable than most.
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http://www.unpluggedfurniture.com/ Retailer in Chicago, Naperville, Bataqvia, Crystal Lake, IL. Also carry Restonic mattresses made by Clare Bedding.
Another member of our site which I also consider to be among the best of the best is within 100 miles and would make a great choice for those who were close enough to pay them a visit.
Beloit, WI and Rockford, IL
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The Milwaukee area has one other manufacturer that I would consider if you are willing to drive into WI anyway and they are listed in post #2 here.
There is also a Denver Mattress in Rockford, IL. They are a regional factory direct manufacturer which makes a range of good quality and value mattresses including a mostly latex mattress/topper combination and a memory foam option but I wouldn’t consider any of the other brands they also carry.
ADMIN NOTE:Removed 404 page link | Archived Footprint: Marr-Sales Mattress Factory Outlet | Marseilles, IL
http://www.magicsleepmattress.com/ Factory direct manufacturer in Marseilles, IL. They focus more on wholesale than factory direct to consumers but they do have a showroom where they will sell direct to consumers. They tend to use polyfoam in the 1.2 to 1.8 lb range and their memory foam is mostly in the 4 lb range and while they are working towards introducing a latex line … they currently only use latex in thin layers as part of some memory foam models. While they don’t “volunteer” density information as a matter of course (because they realize that most consumers don’t know the difference) … they will disclose the specs of their foam to anyone who asks.
The earlier post #2 and this list includes everything that I’m aware of and would consider within about 100 miles of Chicago.