LG G2, iPhone 5 or Sony Xperia Z?

Actually I have the LG G2 and I bought it 4 months ago and it's a second hand. Also I forgot that my LG G2 is a korean version and I'm not a korean. If ever I choose a phone, I would like to have a brandnew phone and not a secondhand. But since that I've experience to use G2, I already adopt it's features and I love it because since that I use this phone, I didn't experience any problem yet with my G2. So what should I choose between the 3 phones, should I keep my G2 or buy a Sony Xperia Z or should I go to iPhone 5? Any advice?

LG G2 and no question about that.

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