My main plasma is a Panasonic, and that is where I wanted to put my money when I bought a new 42" for the bedroom last year.
In the end, all the issues with Panny screens and there was some apps missing from the panny selection that I wanted. So I went with Sony.
The picture isn't as good as my Panny plasma (obviously) but it does the job ok for the bedroom. However, it doesn't have all the On Demand apps either (no itv or 4od). Booooooo.
I'd probably have a look at the Sony Android though if they can fix any issues. I would also generally avoid 4k this year. There is little point in paying the premium for it just now until it all settles down.