I ordered both the silver and space grey versions because I couldn't decide. The more I compare, the more I think the silver is best. To be honest, I wish they offered silver with a black front. I only want black for practical reasons, as I believe it makes the screen more easy to read with less distraction, but I prefer the silver back.
If you want to hear something "girly", how about this: I think the silver with the "soft pink" case is by far the best looking combination. I ordered both the midnight blue and soft pink case so can decide later. The blue looks sweet against the white phone, but the pink is tops.
Yes, I am a man.