What about those Sena leather pouches they are just a few mm thin and italian napa leather and really doesnt bulk phone out at all. Also it is felt lined so cleans your phone (sort of) when you put it in and out. Had mine on my 3GS and it's kept it in tip top condition.
That way you can protect the front and back in your pocket, reduce grime and also doesn't add bulk. When i bought mine was £25 so guessing they will prob do one this time around for around £30
http://www.senacases.com/apple/apple-ipad-cases/ultraslim-cases/
$60
😱 lol yesterday they said $30 robbing b$&$&$