1) Does the Node do AirPlay?
2) Does the Node have a HD to store your 30 albums?
I have an older Node2 and it does neither
I just looked it up and the current Node adds Air Play. As per the previous post you can probably store 30 albums on a flash drive which you connect to the usb input on the Node. I've never done this so I can't comment on how well it works. Then connect the Node through a non usb connection to the Benchmark.
Otherwise the Node will probably serve your needs. Keep in mind that many have had product reliability issues with Bluesound, but fortunately we are a minority. At the price it offers a lot of functionality and the App is pretty good