New DST Range Extender

Judging from the documention (manual and FAQ), the DST6501 adapter is a HomePlug AV2 Powerline adapter with a built-in Wi-Fi Access Point. It's marketed to be used with the new R7300 DST router, which must surely be a router with a built-in Powerline adapter. Since a Nighthawk AC3200 doesn't have a built-in Powerline adapter, the DST6501 won't work directly with it.

The question is whether a DST6501 will work with a regular, non-DST, HomePlug AV Powerline adapter. Hopefully, Netgear designed it to be compatible. Perhaps a moderator can check with Netgear engineering, respond here and update the FAQ.

If it turns out to be compatible, then all you need is another Powerline adapter to make it work with your Nighthawk. On the other hand, if you don't own a R7300 DST router there is limited value in getting the DST6501. The attraction of the DST adapter/router combo is the plug and play ease of setup, but that literally seems to amount to them being preconfigured with the same Powerline password. In fact, the password is not even random (it's HomePlugAV), so I'm not sure anyone would want to use it without changing it. But then you've lost the plug and play advantage and are no better off than buying regular Powerline adapters.

As for the R7300 DST, I suppose it's kinda nifty to have built-in support Powerline. The R7300 manual doesn't list the specs of its Powerline adapter. Personally, I'm fan of keeping technology components separate (within reason) for more flexibility in upgrading, but to each their own.

Note: Take this as a personal opinion based on a quick perusal of the documentation. My observations and, hence, conclusions could be mistaken.