Hi mapadoobu,
In terms of quality and durability … all of their mattresses use good quality and durable materials.
In terms of “value” … in most cases the mattresses made by a manufacturer would have similar value across their entire lineup and BE certainly has much better value than the larger brands IMO and I think highly of them.
In terms of comfort and support though … especially with a local purchase … I would strongly discourage you from taking any advice from anyone else (including me) that can’t feel what you feel or see you on the mattress and trust your testing and your body along with the guidance that comes from conversations and questions to retailer that has good knowledge and experience. They are by far the most knowledgeable about their own mattresses and in my experience BE retailers know their stuff.
Only you can (and should) decide on the best balance between comfort and support in a mattress because only you can feel what you feel when you lie on it. The only thing I would suggest is that if you are undecided on a choice between slightly firmer and slightly softer I would tend towards slightly firmer because it’s a “safer” choice.
I would trust your body, your careful and objective testing, and any good suggestions by the retailer you are working with about the things you can’t feel when you are testing (such as helping you with alignment issues or how temperature regulating a mattress may be in your longer term experience).
When you are looking back at your mattress purchase years from now you will remember much more about how well you slept than you will about the final price you paid when the differences are relatively minor and your own personal value equation is always the best way to make final choices.
Phoenix