Hey bmorgan,
Well, if you do move into the research phase, it’s important to read some of the TMU articles like these:
How to look for and find best mattress and Mattress shopping tutorial and also 5 Steps to your perfect mattress.
Sorry again about the back pain, please keep in mind, there is no such thing as a mattress that is “good for back pain” in general terms (just like there is no such thing as one mattress that is suitable for everyone) … there is only a mattress that is good for “YOUR” back pain and this would be a mattress that keeps your spine in good alignment in all your sleeping positions over the course of the night and would be different for different people.
If you have the time, check out our trusted members, there is clearly both quality and value and they are transparent with the type and quality of the materials. Let us know if you have any more questions.
Good Luck!
Sensei