I quit using HDR with my K-5. I saw no significant improvement. Back using my *ist it was areal thing, although I always used photoshop layers to achieve the effect, not the built in camera one.
The built in camera for me was un-impressive, although, I haven't tried it for years.
The 15 EV DR of a K-1 probably gives you more latitude than my K20D with HDR enabled.
My K-1 is rated by DxO at 14.6 EV DR my K20D at 11.1.
You need to cover 1.5 stops in your dynamic range settings, so 3 images 1.5 stops apart, to match what you can do with a K-1 without HDR.
This is not HDR, do you care?
The DR of modern sensors makes HDR mostly redundant in my opinion.