I returned 3 curves before I found one that was "solid". I had read about the dust issue, and mine seemed a little loose each time. Even though the store thought I was crazy, and at one point didn't want to do it, they eventually did when I raised enough hell..
I'm glad I did it now after all the issues I have read. Also, try using a skin.. I use one for my 8300, put it in my pocket every day and have never had an issue.. Just another idea for you..