Thanks for considering DLX.
To better assist, knowing the brand and model of your in-laws’ guest bed would be helpful. “Traditional innerspring” can mean a lot of things and we don’t want to point you in the wrong direction by assuming it is an open-coil mattress when it actually uses pocket coils, or vice versa. It would also be helpful to know how much padding is above the coil unit.
Knowing what is supporting the mattress underneath is helpful as well, since that can contribute to the overall feel whether it is a box spring, foundation, bed frame, adjustable base, platform bed, etc.
Any of our mattresses will work on most adjustable bases. One thing to keep in mind is that a lot of the more affordable adjustable bases use metal bars or a wire grid for the decking like this one and we do not recommend that style. The challenge is that some manufacturers cover the metal grid with fabric and fiber, making it harder to identify. We want the decking to be made of plywood or a similar solid material. Obviously, there will be gaps where the base needs to bend.
Just our two cents on adjustable bases. They are great for people who need to elevate their head or feet while sleeping or need to sleep in a reclined position. For sitting and reading in bed, speaking from personal experience and everyone is different, but I haven’t found a position on an adjustable base that feels particularly natural or comfortable for reading. I’d rather have a bed with a headboard and use pillows to sit up.
We hear something similar from other people who buy an adjustable base primarily for reading. Many end up not using the feature very much and the base remains flat most of the time. So, if you are only considering it for reading, I might put that budget toward the mattress instead unless you need to elevate your head or feet while sleeping.
Without knowing the brand and model of your in-laws’ guest bed, we would probably rely more on the fact that the Nest was comfortable until it gave out.
With more information about the guest bed, we might suggest the Classic or Essential. However, those have more of an old-school feel with minimal padding between the coils and the sleeper. They are more coil-forward and don’t feel like most modern mattresses and by modern, I mean most mainstream mattresses made over the past 20 years.
The Classic Two Sided Mattress uses an 8" pocket coil, which works well for a lot of people. However, if the old guest room mattress uses an open-coil unit, the 8" pocket coil will not have quite that same firm, rigid feel.
We do have an off-the-menu option where we can use a 6" pocket coil inside the Classic instead. This gives it something closer to that more rigid open-coil feel for people who prefer that type of support. Don’t get me wrong it won’t be exactly the same as an open-coil mattress, but it brings people closer to that feel and ends up working for the vast majority of people who are specifically looking for that more traditional open-coil type of support.
If you are only going to sleep on your stomach and back, we would recommend the LatexLux Hybrid 12" in Medium based on the Nest working well for you out of the box.
If you don’t get an adjustable base, please make sure the mattress is properly supported. A lot of the bed frames and platform beds out there even ones rated for more than 1,000 pounds and with great reviews may not provide proper long-term mattress support.
The issue is that many of those reviews are written after someone has owned the bed for a week or two, so they aren’t really judging long-term durability or mattress support. When an inadequate support system eventually contributes to sagging or makes the mattress feel unsupportive, the mattress often gets blamed. People end up buying another mattress without fixing the root cause.
I also think some of the weight ratings are a little suspect. I doubt many of these frames could withstand even 200 pounds concentrated at a single point. For example, a 200-pound person standing with all of their weight in one spot on the frame without something bending or breaking.
This applies to our mattresses or any other mattress you are considering. It isn’t a DLX-specific issue. Beyond the MUG, most mattress companies don’t talk much about the support underneath the mattress.
If you decide on DLX and need help figuring out the proper support, we’re happy to help. It’s difficult to give one quick answer because there are a lot of options like platform beds, foundations, bed frames, adjustable bases, etc. and each can have slightly different requirements. Room aesthetics factor into the decision for people as well.
Even if a particular bed or frame doesn’t provide ideal support out of the box, there are often relatively simple things that can be added to bring it up to speed.