Hey Ford,
Welcome to the TMU Forum and thanks for your question.
Congrats on your mattress shopping journey :cheer: ! Thanks to trusted member Quality Sleep Shop for offering their insights and indeed, sounds like you’ve identified coil support construction as your preference. As you probably know, Marshall Mattress founder James Marshall invented the pocketed coil as we know it today with his “Marshall Unit”. This system utilizes steel coils individually covered in fabric, allowing for independent movement of each “pocket coil” in the support layer. For others who may be following your research, TMU’s “coil types” overview Mattress support cores - Innersprings is a good reference for understanding innerspring mattress design.
Glad to hear you are making store visits, an integral part of understanding the “feel” of the layering and components that no amount of research, reviews and opinions can give to anyone individually, as what You feel in terms of preferences/ PPP can only be felt by You. For more thoughts regarding mattress materials/ layering “feel”, Five steps to your perfect mattress- Initial feel is a good resource. Questions for you: can you describe a little more about your current Marshall construction, aside from being “too soft” and what size mattress/ box spring are you replacing? Do you have any updates on your store visits, it has been a short while since your post (and apologies too for the delayed response). Also, I’m moving your question to the General Forum where others can comment and follow your process. Looking forward to hearing more details.
Thanks,
Sensei