Old days & steamers vs newer stuff?

@kota1 I have no idea what dnla or UPNP is. I had a helluva time getting my node 2i up and running. If the dts play is just an app to control the streamer, I could handle that, but I'm not computer/ IT savy at all. Nevertheless, $200 for room correction seems like a bargain of an upgrade, so maybe I'll see if I can get help here or though Martin Logan to set it up. I never use the Bluetooth feature,  so I won't miss that. Maybe I can sell my Node or set it up in another room. I'm not sure how these "roon endpoint" things work, but I don't have roon, so I doubt I could use the node 2i in conjuction with the unison, so I could sell it or make a second system. I'm also am using an old Parasound Zdac that may be lower quality than the dac in the unison (your thoughts on which I should use?) I'm tempted to buy this and possibly improve my sound for only $200. Wish me luck and give me your thoughts.

Current integrated is a Yamaha A-S500 btw. Acoustic Energy Aegis 3 speakers.

@soix I'm just trying to gradually increase my sound quality by upgrading the weakest link, or item that would make the biggest bang for buck improvement. My budget is "poor". Which probably quantifies as $400 per month to spend on stereo.

I don't know how long they're on sale for, But now I need you to decide between the unison and the forte. I'm leaning towards the unison simply because my Yamaha A-S500 integrated is a class AB which may yield a little more grunt. And watts than the class d amp in the forte.

Apologizing in advance for my ignorance on digital. (I'm a 2 channel tube/ vinyl dinosaur) 

What is the best uncompressed source to play through this Martin Logan Unison device? Can I use my Pandora on my iPhone linked via blue tooth? (seems like I may need another box to receive this signal?)

I recall reading that the music played through the iPhone is compressed.  I hooked my iPhone into my ARC SP 15 and it sounded like crap. I assumed it was due to the audio being "clipped off at both ends"

I'm hoping somebody can give me understandable advice as I'm ignorant of the digital developments. 

That particular martin logan streamer does not have bluetooth. It operates by pairing both devices on the same.wifi network. I believe  streaming over wifi actually gives a better signal than bluetooth. There are other Bluetooth streamers like the Bluesound Node that have a bluetooth option to stream along  with wifi method but wifi streaming is always better I believe. Maybe others here can elaborate because I too am a dinosaur and not computer savy.

The DTS Play-Fi app works fine and they update it for free, here is a video about the app. It will show you how to play uncompressed and hi res files with the app. I think Tidal, Quboz and Amazon Music all off hi-rez streaming which works with the app:

https://youtu.be/L7gHmTG8WiE