Please help me choose a Costco Memory Foam Mattress

[Betsy80]

Hi everyone!
I've been sleeping on a 20 year old sagging mattress. The lower back pain is debilitating. I am dumb for not realizing what I was doing so long. I have had tmjd for 13 years, severe head, neck, tmj, temple, jaw pain due to orthodontics. But my back was fine till the mattress got worse. So I would like to buy one of the 3 below, preferably one of the 1st two because their on sale. I use a tempurpedic pillow which I can't live without, but can't afford that brand in mattress. I am seeking a medium firmness, not too soft not too hard. I would be using the mattress with slats, not using a box spring. Any help appreciated, I chose 3 from Costco below, please tell me why one is better for support and pain issues over another. Thank you!

http://www.costco.com/NovaForm®-Pure-Comfort™-Full-Memory-Foam-Mattress.product.100004052.html

http://www.costco.com/Sleep-Science-10%22-Full-Memory-Foam-Mattress.product.100004108.html

http://www.costco.com/Novaform%C2%AE-14%22-Gel-Memory-Foam-Full-Mattress.product.100026995.html

 

[Good_Sleep]

I don't think anyone wants the responsibility for telling you which cheap Costco bed to buy. But the good news is, you can take it back when you don't like it (Within a resonable time). You have to understand the foam the use is very cheap chinese imported foam. Don't fall for the made (assembled) in America logo. A lot of manufacturers I believe pull that crap.