ok I've tried 5 cases so far
S-View Cover (official)
Fosmon HYBO dual layer
otterbox
Some generic or copy of the armor view cover
Image power bank cover
and Trident Cyclops
Hands down day-to-day Trident is my choice. the thing is rugged but adds zero bulk in my eyes. The extra cushion on the corners definitely adds to impact protection. The only down side is the built in screen protector is not as awesome on full clarity (not a deal breaker) and many have removed it and replaced it with a glass or other screen protector.
Cyclops Case for Samsung Galaxy S IV
Here's the key features
Meets Military Standard MIL-STD-810F: vibration, dust, sand, rain, drop (Independently Tested)
Shock-absorbing TPE
Hardened polycarbonate plastic shell
Built-in screen protector
Dust filters over speaker bays
Silicone plugs over port openings
Lanyard loop
I just need something for more damage from a physical attack on the phone since I had my phone Liquepeled (Waterproofed).
By the way the phone has been tested and not on purpose lol.
My S4 went from my shirt pocket into a bowl full of water. It sat there for a good 15 second. I got it out, shook it off and the answered the call that came in. The liquepel plus this case made it a worry free experience. Infact I put the phone under the faucet to clear it out with clean water lol .