For those looking for more durable covers.
Like you I turned to the apple community to answer this question. While many of these suggestions revolve around what looks cool, I need protection for my iPhones. In my research I have found this means I want "triple layer protection" i.e. there is a screen-protection aspect of the case.
I am a longtime Otterbox Defender user and it saved my phone many times. Droppage, pools, wrecks, errant foosball handles to the front pocket, etc. (I even used to throw my iPhone as a party trick. There was always a gasp but when I picked up my phone it was always fine. Yes, I realize now this was stupid and I don't do it anymore.) Now that I bought a 6, I am finding there might be better options, especially because while loyal to otter box, i have to say their designs have gotten less appealing in the way of coverage (open ports, etc.) and the outside rubber case always tears and has to be replaced. While I was still loyal and planning to order a Defender again, the reviews of the defender for the 6 that are already in are not super stellar.
Here is a list of what looks like reasonable defense cases.While I can speak for otter box defenders' protection, the rest is just my research.
My guess at the top three Triple Layer Protection cases for the 6 in order:
E.C.L USA iPhone 6 Case Protective Armor Slim Fit Triple Layer Protective Case with Advanced Shock Absorption Protection with Kick-Stand.
Zerolemon Apple iPhone 6 Protector Series with screen protector (this design looks very similar to the defender)
The Otterbox Defender of course