Yay, you got the 5!
I have the Otterbox "Defender" for mine...ya, I'll be the first who likes the brand. I had an Otterbox for my last smartphone & decided to get another one.
Yes, it's a little bulky. I need mine with the holster (for work), so it does add some bulk, but I'm not the type that needs super thin cases.
Matt has the Magpul one & I do think its nice as well.