If you're that inclined to protect it, any case or shell should fit the bill, since its probably going to be thicker than the bump itself.
Also, I highly recommend a screen protector. My 920 has been naked for a while and gorilla glass is doing work, but I wish I had one from day one. (actually the one I ordered should be arriving very soon) EDIT: It has arrived, what a beauty.
An accidental gravitational accident at the butterfingers of a friend resulted in a few scratches I'm not to happy about. Considering the sheer size of the 1520's display, I'd recommend you get one even sooner.