My wife has been through two KING size foam mattresses in the last 5 years. At 160 pounds, you should be good, but just a little over 200 and they become questionable on durability. Particularly if they start out on the "soft and comfy" side.
Flippable mattresses are pretty much a thing of the past. It's much cheaper (and profitable) to make the foam never flip kind. You can spin them 180 deg. but that only helps a little bit.
I ended up with two nice ones for the guest rooms. One is a "Hotel type" discontinued model for $500. Everybody loves it, but it is a bit firm for me. Those who are back sleepers or use CPAP can handle firmer mattresses.
I'm a side sleeper. I use a HYBRID mattress that has both foam and springs, has a bit of give to it. Got it from Mattress Firm for about $2000.00.
Edge support is very important, look for that. It's holding up very well.
My wife's mattress was replaced under warranty once since it had sunk an inch and a half in the middle....still cost over $3000.00 difference!
I'm just not happy with all foam durability.