I've been using a tpu case along with a basic screen protecter (not really necessary with gorilla glass) and have been thoroughly pleased. I use this case because it offers decent protection without compromising size. Otterbox cases are extremely sturdy, but add a considerable amount of bulk. I have dropped my phone from numerous heights a couple times and have not noticed any physical blemishes or loss of functionality. For those looking for some medium level lightweight protection, I would greatly reccomend a TPU case.
Sent from my MB860 using XDA