I still am considering building my own foam mattress, that way I don’t have to worry about indentations, sagging etc because I’m buying the hq foams. And even if I get a innerspring set I’ll still get a hq topper for it. Thing is I do like the bounce of a spring mattress but would only consider 2 sided and can’t see paying all that much more than the foam mattress I can build. I would be much lower to the ground if I put the 6" of foam right on the slats but I’m sure there are higher bed frames, or I could pick up a box frame so foam bed is still very much an option–they even sell 6" mattress encasements for foam mattresses. I would think the orthopedic extra firm from Original Matrress Factory would be good with it’s 5 turn 12.75 gauge offset coils and working box spring except I read so many negative reviews, while the Serta I mentioned the reviews are all good but not only do I hear they are not a good company looking at the cut out it appears the coils only have one turn at 14.75 sure there are more of them than the ortho’ but whatever. This mattress field is one of the more deceptive ones I’ve researched a product for. If I build one out of hq foams that I can weigh to make sure I’ve got what I paid for I know from experience how it hold up. I was just thinking I like to sit up in bed and a firm innerspring mattress would be nice for that. I was just hoping someone would know more about 2 sided innerspring mattresses. I’m not going to chance wasting $900 when for $3–$400 I can get a quality foam one (maybe $500 or 6 if I buy a box spring or a high platform frame. Just looking for answers.
[quote=“Phoenix” post=67251]Hi Alpharalpha,
So, it looks like you’re taking a different approach now in your search for the perfect mattress! 
He[quote]llo, I have managed to find a couple of double sided mattresses with a minimum of padding to minimize the indentation problem that seems to be going on.[/quote]
This is unfortunately all too common with the major brands in the industry, as the prevalent use of lower-density foams results in decreased comfort life and excessive body impressions, whether or not the foam feels firm (has a high ILD/IFD, but a low density).
[quote]My plan is to get a firm mattress
Here are the ones I’ve found
Serta – US Mattress ($900)
Mattresses For Sale | Find Your Perfect Mattress | US-Mattress – US Mattress ($600)[/quote]
The major brands such as Sealy/Stearns & Foster, Simmons, and Serta all tend to use lower quality and less durable materials in their mattresses than most of their smaller competitors that will tend to soften or break down prematurely relative to the price you pay which is why I would generally suggest avoiding all of them completely (along with the major retailers that focus on them as well) regardless of how they may feel in a showroom along with any mattress where you aren’t able to find out the type and quality/durability of the materials inside it (see the foam durability guidelines here, these additional guidelines here along with post #3 here and post #12 here and post #404 here). Until you can find those details about the foam used in those mattresses, you won’t be able to make an educated decision, and many of these brands unfortunately won’t even share foam densities with their representatives or retailers.
(if anyone knows of others I’d appreciate any information.) Thanks.
Unfortunately, I don’t keep a record of the individual mattresses or their specs that the retailers and manufacturers in the hundreds of forum lists throughout the forum carry on their floor or have available online (it would be a bigger job than anyone could keep up with in a constantly changing market). Perhaps some of the more knowledgeable members on this site can help provide some insights of better quality two-sided mattresses for you.
Phoenix[/quote]