Hi coast,
Whether a Roomandboard mattress is ābelow averageā or āabove averageā would depend on whether you are referring to PPP (which is subjective and unique to each person) or the quality/durability of the materials in their mattresses. Some of their mattresses are certainly āabove averageā in terms of the quality of their materials compared to most mainstream brands even though they may still not be a good match for you in terms of PPP.
Savvy Rest certainly uses high quality materials (Dunlop and Talalay latex) in their mattresses and there are no weak links in any of them. As you mentioned component mattresses also provide good options to customize a mattress both before and after a purchase but they are also in a higher budget range than other mattresses that use the same type and/or quality materials or that offer the same or similar benefits and options so I would make some careful value comparisons.
The better options and possibilities Iām aware of in the Chicago area are listed in posts #2 and #4 here. No matter what you end up purchasing, I would make My Green Mattress / Quality Sleep one of my priorities if I was in the area.
Phoenix