Hi bigfootnells,
They certainly don’t have a “good mix” of foams in terms of quality and the comments I made to the previous poster would apply to your questions as well. Buying a major brand mattress where the comfort layers use lower quality/density materials is a very high risk proposition at best and a case of buyers remorse fairly quickly down the road as the lower quality foams soften or break down at worst.
The first place I would start your mattress research is the tutorial post which has the basic information, steps, and guidelines that can help you make the best possible choices … and avoid the worst ones such as the Simmons you are considering.
Reviews are among the worst ways to choose a mattress. Reviews don’t provide any information about how suitable a mattress may be for your unique needs ad preferences in terms of PPP and they also don’t have any informaiton about the quality or value of the mattress. There is more about the difference between mattress research and reviews in post #13 here.
When a mattress is significantly overpriced in the first place then even a lower price than “normal” doesn’t represent good value.
Unfortunately they don’t provide the comfort specs of their mattresses (or the quality specs either) so you won’t be able to find a mattress with similar specs because you wouldn’t have a reference point to start from. Even if you could it would be preferable to find a mattress with much better specs anyway. The best you could do to find a mattress with a similar “feel” but better quality materials is with your own personal testing but you can’t feel the quality of the materials in a mattress when you test them in a showroom or sleep on them and the only way to know the quality and durability of a mattress or make meaningful comparisons with other mattresses is by knowing the construction and the quality of all the materials and components inside it. Testing a mattress based on “showroom feel” also has a less than random chance of making the most suitable choice (see this study) and I would suggest using the testing guidelines in the tutorial post instead.
Some of the better options and possibilities I’m aware of in the Greater Philadelphia area are listed in post #4 here.
I’m glad to see you were able to register and post 
Phoenix