Hi Jthomp24,
There is some information in this thread and in post #12 there are a few options for online memory foam mattresses that I consider to have good value. This is an area where I am currently doing a fair bit of research and there will be a few additions to these sources in the next while.
The best source for mattresses including memory foam is of course local manufacturers who make them and sell them factory direct so if there are any in your area, that would be the first place I would look. If you would like a list of any that I know of that may be near you, just let me know the city that you live in.
While the Sleep Innovations is certainly inexpensive enough … with a mattress like this I would first check into the return policy because if you end up not liking it, the costs and effort to return it may be more than the mattress is worth. It also doesn’t list the density of the memory foam used which means that the quality or how long it will last you is unknown. If is less than 4 lbs I wouldn’t consider it at any price. I would tend to avoid any mattress that doesn’t include good information about the memory foam or base foam they are using.
The 10" gel memory foam Serta at Sams Club also doesn’t list the density of the gel memory foam used but if I had to guess (based on educated speculation) it would be the same as the sleep innovations versions which are around 4 lbs. If this is the case, then they are lower quality than the Serta iComfort and do not have the same layering but they certainly are an option worth considering only because if they are not suitable for you then there is no risk because of the Sams Club return policy. Comparing them to the iComfort however is not an apples to apples comparison.
If I was going to order a 10" mid quality memory foam mattress from Sams Club, it would be this one which uses 4 lb Aerus memory foam which is one of the most breathable memory foams available and is good quality for a 4 lb memory foam.
Some of the options listed in the thread I mentioned earlier would have similar layering to the Tempurpedic cloud series however each memory foam and every different type of foam underneath the memory foam will have a different feel … even if the pressure relief and support is similar. At least with some of these options … the feel can be changed by re-arranging the layers or in some cases exchanging the layers after you have received the mattress.
Phoenix