Recommend a newer model of a Netgear NAS?

I'm a little off topic, but you both referred to data streaming,
so I get great streaming from my old ReadyNas Duo v1 to my Samsung Galaxy S4s
using BubbleUPnP with MX Player and the MX Player Codec for (ARMv7).
I don't even know what a codec is for sure, but does it do transcoding on the client?

I use 8Player on my iPad (fairly new, it has the lightening connector),
but the HD video shot from the Samsung phones and HD digital cameras,
plays jerky and shutters enough to be unusable.

I downloaded the iPad app, IFUSE, this morning and it seems to play the video much better.

What is the "best" iPad app for streaming HD video from my ReadyNAS Duo?

Do the newer 3xx series ReadyNAS servers take that "transcoding" computing load onto the server?
Thereby allowing more clients to stream successfully?

Thanks!