I just bought the Sony a7sii. On the day the Mirrorless DSLR arrived on my doorstep, Sony introduces the a7iii! I should have known because this happens to me quite often. As soon as I purchase a big ticket item, they release the latest version – even though all my research. So now I have a dilemma. Do I keep the Sony a7sii or return it for the Sony a7iii? What would you do?