iPhone 6/6+ case - help me decide

[TDW]

I don't like bumpers, i want also back protection.
I don't know if to go with Spigen iPhone 6 Case Neo Hybrid
http://www.spigen.com/brands/apple/iphone/iphone-6/iphone-6/iphone-6-case-neo-hybrid-4-7.html

or with Spigen iPhone 6 Case Neo Hybrid Metal
http://www.spigen.com/brands/apple/iphone/iphone-6/iphone-6/iphone-6-case-neo-hybrid-metal-4-7.html

Or could you advice me another case that you think is good for the iPhone 6? (not a bumper case)

Thanks