Hi AintNoZinBoise,
Welcome 
I’m looking forward to finding out what you end up deciding … and to any comments or questions you may have along the way as well.
Based on your username I’m guessing you’re in Boise so subject to confirming that any retailer or manufacturer on the list that you wish to visit is completely transparent (see this article) and to making sure that any mattress you are considering meets the quality/value guidelines here … the better options or possibilities I’m aware of in and around the Boise area are listed in post #2 here.
Phoenix