I started with the $10 silicone case and now use the Otter Box. I bought it in hopes of keeping dust out since I prefer to carry the phone in my pocket and I noticed alot of lint, granted I wear cargo shorts and put in the lower pocket but still had a fair amount of lint and I already had one phone replaced under the 30 day return policy for dust under the screen.
Saturday night I divorced the clear plastic screen cover and now I'm happier than pig in slop. The ear piece is still a bit of a pain but I can type again and that was the biggest downside I had, especially with this smoking fast Hybrid BBcrackman gave us I had to ditch that plastic. The overall case covers all the edges of the phone except the lower button area and my last storm had dust under the screen at the top so I'll cross my fingers and keep on going with the Otterbox because it is a brut case and the holster is tough all the way though I rarely if ever use it but the screen is protected in th holster.