Q: why add A6000 when you already have a7, plus you mentioned you want to add a7r soon?
Good question ... let me answer that in the order of priority:1.
Severe GAS problem 2.
It only costs $649 (much of which will be funded by the sale of my G1 X)3.
I want to have it mounted with the 10-18 lens and take it during business trips to make interesting architectural shots at airports, restaurants, office towers etc.4.
As on this coming Sunday, 16 Feb (BTW, our work weeks starts on Sunday here) our office location is moving to a 57 storied building where my office room has got some good views of downtown Doha (capital city of Qatar) ... so I plan on making some images of this fast changing city. (When I first came to this city, less than a decade ago, there was only 1 building of 14 floors, now there are 36 towers that make up the downtown business district - the tallest tower right now is 70 floors).
But the a6000 will only be available sometime in April, so GAS problems could change.