You should wait for the Z3's price to drop.
Z2 is a good phone, but has some quirks, off center camera, build quality issues, yellowish tint on display etc, so Sony changed the manufacturing place (please Google on this further), I'm confident that Z3 will sort all the issues of the Z2, but I still will wait for reviews.
Z2 is a good phone nonetheless, but still it's better to wait for Z3 especially when it's already out.
These issues must be from the first batch of the Z2 line...right??? or is it still present in the phones being made now??