if you browse this sub-forum you'll see lots of recommendations and there is no consensus on any because its all subjective to how you like things.
That said, I like to semi protect my iphone, but yet retain its natural beauty as much as possible.
I've ordered these two case to test and waiting of their arrival.
Image
http://www.amazon.com/Black-Replicase-Crystal-Jacket-iPhone/dp/B003V2NVQ4
Which is a air jacket type snap on case but the back side is a replica of the iphone. Makes it looks like a naked iphone but with a case on.
Image
http://sinjimoru.com/blog/inlite/
I see lots of bumper out there that are nice but notice almost all of them tend to push on screen protector causing it to bulge or bubble up. Seems like this one doesn't. Got the clear one.
http://loveash.tistory.com/469 http://www.iprosumer.co.kr/upload/CMS/B299213E-E684-A358-BDF2-BADFEF4543D3.JPG