I once tried to get the rs232 control codes for a Sony receiver (pre purchase). I even went past support and corresponded with the US executive staff.
After that experience I don't buy Sony products. ever.
I was reading that ad during breakfast today and considered grabbing one. I'm in the middle of a remodel though. I think I'll just wait. With all the finish work I have lined up I might as well wait another year for the motheye 80 when it comes out.
You're right about Freenas - you cannot add a drive to the array. You add "sets" of drives. IE to add 3GB you would need 2 - 3GB drives. It also needs more hardware capability that unraid/flexraid/mdadm. IIRC, they recommend 8GB of RAM as a minimum.
What is best for you really depends on what you want to accomplish. If you want to use it as a server (run other apps as well as nas function) then something like flexraid is a good option. If you're going to use it as...
I've been running unraid for several years now. During that time the same array has undergone multiple changes - motherboard swapped out 3X, controller 2X, chassis 3X, unraid version upgrade 3X, hard drive expansions 4+X, and multiple hard drive failures (no data lost). Bottom line - unraid may not be perfect, but it works and is extremely reliable.