I ran into a guy who owns a local 'sleep shop' and asked him and he said "Go lay on it and you'll know."
There has to be more to it than that, doesn't there?
He also said "You aren't going to get a decent mattress for $400." (implying that it will cost upwards to $800.)
Said the cheaper mattresses have lower quality springs.
Seems like there should be some kind of science involved in the purchase process.
What say the PP brain trust?