After having gone through just 40+ pages of this tremendous, but humongous, thread I went out and bought my A7 today, adding the FE55 and also a Contax G 90/2.8 (incredibly sharp and with a lovely bokeh when tried out in the shop) with an Olympus Om 28/2.8 to get me by until I decide what else I'm going to buy for it. I also have the Zeiss 21mm in F mount too. The superb shots in this thread having had a strong influence on my choice of lenses !
Also bought Contax G, OM, and F adaptors (with PK to follow) and extra Chinese batteries (x2), charger and flash (less than half the price of the Sony) for occasional use.
Very excited to get out there and try these lenses on the A7 - thanks for the inspiration !