I also went the Spigen route with a Tough Armor and Glas.Tr, but I've used their products for the last couple iPhones I've had along with my son and daughters iPhones. My son uses one of Spigens leather wallet cases and he loves it, he is pretty picky and changes cases a lot trying to find something he likes but has had the wallet one for a while and says he loves it.
I also have the Apple leather iphone case for my 5S and it's actually not a bad case, fits snug and doesn't add much bulk at all.
I would love to get the Portenzo Alano Slim for my phone, some day.