To be honest I can't think of a better case than Nokia's official wireless charging cover. Besides being super thin and colourful, it actually protects the 925 perfectly because however I drop it, the phone always lands on one of the edges covered by the case.
The wireless charging cover only has a "nub" at each corner of the phone - maybe it's working for you in real-world, but not sure it would make me feel safe.
Oh - I now have an Incipio Feather ($10 on clearance at ATT stores). Probably the least protection of all my cases, so it will likely see little use - but the teal matches my Bose headphones (but not really in a "manly" way).
I have an Amzer Pudding coming today - Amzer seems to have some decently designed cases, but the 925 design seems less "current", not as good as their cases for some of the newer phones. And it is all black too. We'll see.
And I also have a
Tech21 D30 coming to try, which some people seem to like.
After this I've got to stop! - too many $4-$10 cases!