Otterbox Defender. I had one on my iP4, also. I apply a Zagg Invisible Shield to the screen and remove the plastic shield in the face of the Otterbox.
Works great and you don't the get bad interaction between the Otterbox shield and the face of the phone.
It's the best of both worlds.
Defender, for me, was very bulky and rubbery making it hard to get out of your pocket quickly; especially with even normal Jeans on. The coolest part of an iPhone is its sleekness and and being slender and slippery. Though I also understand wanting to protect. The iFrogz Luxe Original and Luxe Lean (I have many colors of them) kept the sleekness of iPhone while still protecting. I also use InvisiShield.Otterbox Defender. I had one on my iP4, also. I apply a Zagg Invisible Shield to the screen and remove the plastic shield in the face of the Otterbox.
Works great and you don't the get bad interaction between the Otterbox shield and the face of the phone.
It's the best of both worlds.