Wow 3-5k matress?

I have one:
- Silent night - RM1.1k - 12" mattress pocket spring. Happy about it although maybe less durable at the edges. But you don't sleep at the edges and if you don't have kids jumping on them it's ok.

- Orhorest - RM1.2k - 12" chiropedic coils. This bed is very firm. It's firm even on the corner/edges and supposed good for spine (as it's firm). It was the cheapest but solid mattress I could find. Cons: Some may find it a bit hard for their taste.

I love the ones with a 2" memory foam cushioning on the top but those costs at least 2k.