I go commando myself. I've had a PhantomSkinz screen protector on it since they released em but use no case. I'm careful about how I carry it and whatnot. I must say though, these things are built well. I dropped it from pocket level to concrete and there is only 1 little ding on the screen housing. No other scratches. Figure I can replace body parts if I ever need to. Did the same with my N95.

I wouldn't want to add any bulk to it with a case.