any suggestions on what to replace Bluesound Node 2i with


I am doing a major upgrade on my home theater system. I want to upgrade my streamer. I can spend around $4500 if I have to. My dealer played a Lumin T2 and the music, Tidal, sounded amazing. He said I would be okay with the D2 if I wanted to save money
Any one have any experience with the the Lumin's. I am open to other streamers, it does not have to be Lumin. Thanks 
galleybob
Oh, have I learned my lesson chasing down the rabbit hole with streamers . While there is some differences , i have found that just adding a dac to the node was more than suffice , hell even the dac in the node2i isn’t too bad on its own . In the end just enjoy the music !!!
@elsfan
I did the same with Pawel. Great guy and very helpful.

He steered me to the SBooster 5V/3A LPS to use with his PSU interface upgrade(which was a snap to install). I am using a modestly upgraded power cable as well.

With my Classe SSP-800 DAC the Node 2i really swings.

I upgraded from the Node to the Cambridge CXNv2 and have found it to be a solid upgrade.   I wanted to keep a simple interface across multiple services (similar to BluOS).   Also needed Spotify connect support.  Tried the Moon streamer/DAC and the Cambridge was clearly the best bang for the buck.  (Note: I also took advantage of the balanced analog outputs, so that likely played a factor as well).  
OP here. I am not just looking to replace my streamer. I am doing a major upgrade of my home theater system with a second subwoofer and a separate 3 channel amp to run LCR speakers. I am also replacing my ceiling speakers with much better ones. I am also replacing speaker wire and cables with much better wire. Adding a streamer is part of a comprehensive upgrade. 
Realistically how much of an improvement will a high end streamer make over a Bluesound Node 2i? 
I realized last night that listening to Qobuz with my Node2i was not that much better than listening to Apple Lossless through my Apple TV music app. 
If I buy the Lumin T2 it will cost about 10X what the Bluesound costs. Should I expect a huge improvement in the music for $4500 or will it be more subtle with somewhat better detail, separation of instruments a better soundstage? I am hoping that before I spend the money replacing the Bluesound I will be able to compare the Lumin to the Bluesound on my upgraded system.