Step-up from Node2i for native AmazonHD streaming?

Like I already mentioned, I’m sure there’s something that meets your needs, but Amazon HD is going to be your Achilles Heal. Any particular reason you’re tied to Amazon? I’m sure the NAD M30 is a nice piece of kit, but using a $4k streamer to feed a $100 DAC doesn’t make a whole lot of sense either. While price certainly isn’t the final arbiter of sound quality, it does have some bearing. A system is only as good as its weakest link and I’ve always subscribed to the belief that everything in your audio chain should all be from the same general quality tier. YMMV.

Look on Amazon to see what companies they have partnered with. McIntosh makes a streamer with Amazon but it's not really a preamp. So far NAD and Bluesound have the best integration. Others have AV's that work like Marantz, Denon, Anthem. 

@crn3371 I like AmazonUHD better than Tidal MQA - that's why Amazon. Topping E30's offer the features needed, and perform better than most, they are a great value, and definitely better than miniDSP 4x10HD (built-in DAC), which is the purpose of this endeavour.

Have you tried Qobuz? If you do some searching you’ll find Qobuz hi res is generally preferred over Tidal. I don’t doubt that the E30’s are a great value, Topping is a brand that punches above its weight class. I was only commenting on the logic of pairing a low cost budget DAC with something along the lines of the M30.

I haven't tried Qobuz. I was using Tidal HQ for about 6mos when A-UHD launched, and switched. I don't notice an SQ difference between the two. A-UHD plays nice with all our Echo devices, NAD (w/BluOS2i) and Denon AVR (also Echo-controlled). With the family plan, we frequently have different music playing in different parts of the house - all works without any problems. Actually, the only problem occurs when Alexa (for unknown reasons) occasionally tries to access discontinued Tidal subscription, "Can't play... on Tidal at this time, login to authorize...". I think this is a remnant from the expired subscription. Asking again usually solves the problem, and it plays from Amazon.