I have not tried the Rhinoskin case, but from what I have read (see
Chris's review), it seems that the DSI uses a stronger aluminum since it doesn't bend at all. The main issues I had with the DSI were the SD holder and the misaligned cutouts. Also, the cost of the belt clip is extra and quite steep. If you don't mind the problems with the cutouts (didn't really affect functionality for me) and the SD holder, and also don't need a belt clip, then the DSI represents good value in my opinion. If you need the belt clip option, you may may want to consider the Rhinoskin.