Hi aoysgelt,
As you likely know … there are some good and many “not so good” choices for online memory purchases.
Often some of the best quality and value is available at local factory direct manufacturers or better sleep shops that carry smaller alternative or local brands and they generally have the knowledge and experience (and the willingness to tell you the quality specs of the materials they use) to help you make much better choices. They tend to focus on what you need and prefer over what they can sell you to boost their profit margins.
If you let me know your city or zip code I’d be happy to let you know about any that I know of in your area.
Tempflow uses some very high quality memory foam and I have talked with Rick who designed them on many occasions and think highly of him. As you know though … they are not in the lower budget ranges. They also have a lower budget lineup which is also high quality and uses more a more traditional type of memory foam (also high quality 4 and 5 lb foams but using a different foam manufacturer which makes the same type of memory foam that most other mattress manufacturers use) and you can see them here.
Astrabeds (memory foam and latex models) is connected with Amerisleep (4.5 lb memory foam models) and Simplyrest (Airbeds). They use good quality foam and have “better than average” value but are certainly not in the best value range. My dealings with them have been somewhat mixed ranging from one good conversation to a few that were very aggressive and higher pressure and of the type that I would be hesitant to purchase from the person I was dealing with.
Some of the better online memory foam outlets that have good quality and value are listed in post #12 here.
Phoenix