looking to upgrade - identify the weakest link?

I would suggest eliminating the PC as your streaming source

There is lots of room for improvement. I'd start with a pair of Forte IVs. Probably a better match for your amp. I'd also shorten the path of your source as much as possible you got a long and low quality path before it gets to your amp, that is not helping.   

Cornerhorns. They don’t occupy living space so their size while intimidating  actually take up less of the your room in than conventual speakers placed away from the front wall. The other benefit is that you set it and forget it. No fiddling around with toe in forward backwards any of that stuff and you can drive them to LOUD with fea watt amp.

Everything from there is gravy. Check the used market they are a steal.

@ex-mtairy - What cables are you using, because they are probably your weakest link. 

Good cables will  improve

• dynamics
• clarity & details
• bass extension/depth and texture
• image and artist placement
• venue acoustics i.e. echoes and reverberations

Most of your components already do all of that, but the cables prevent them from demonstrating what they can really do.

I have the Node 2 streamer fitted with great interconnects and power cable and it punches way above its modest price point

You can even make cables yourself that outperform many of todays top brands.

For details See: My Audio Alchemy (image99.net)

And to read what others think: https://forum.audiogon.com/discussions/duelund-conversion-to-diy-helix-geometry-cabling

Hope you find what you are looking for - Steve