Hi lastminute,
I’m glad I could be of assistance. I was worried my response wouldn’t be fast enough for your timeframe. As you may be aware, SleepEZ is a member of this site which means that I think very highly of them and that I believe that they compete well with the best in the industry in terms of their quality, value, service, knowledge, and transparency. They are extremely knowledgeable about latex and different configurations, and I would not hesitate to recommend them for your consideration.
Yes, over five years of 16 hours a day does tend to accumulate quite a bit of information for you to sift through. When you are ready for yourself, the first place to start your research is the mattress shopping tutorial here which includes all the basic information, steps, and guidelines that can help you make the best possible choice … and perhaps more importantly know how and why to avoid the worst ones. As you’re working on another (and most important) project right now, I’ll leave it at that regarding your own personal process.
I’ll be interested in learning about your decision for your parents.
Phoenix