Joshua, I think your arguments about availability making the S5 the best flagship are wrong.
Phone for phone, the Z2 is clearly the better offering.
The only question marks about the z2's availability is in the US. Sony many push it harder this year than they did their previous flagships.
The z2 is very strong on all fronts, design, features, specs and camera but the S5 is weak on design and not as good all round as the z2. You got this one totally wrong bro and the comments here show must how many disagree!