Node2i + Qutest or Yggy or Codex or something else

If you want to try a different pre-amp, just to see if it produces the sound quality improvement you seek, you could buy the really cheap Shiit SYS and give it a try. Only $49, 2 switched inputs and one output. No frills, volume control and 2 input switching only. Not a bad little piece of kit to have lying around for emergency backup either... For $49, you'll know your answer. Also, Shiit does offer 15 home trial for a 15% re-stocking fee. 

Thanks for all the quick responses.

My budget is $1800 and less.
I can’t afford Chord Hugo, PS Audio and other higher priced products unless their used price drop.

I have tried both:
1) Node2i DAC: analog output to P5
2) P5 DAC: Node2i digital output to P5 with Audioquest Carbon toslink 

I find Node2i DAC a little forward, bright, clearer and harsh compared to P5 DAC.  But I have only had 1 week to break in Node2i DAC while the P5 has been used for over 1 year.

I can possibly audition Qutest and Codex but not Yggy as there is no show room.  

I use the Node with an Ayre Codex.
John Rutan had a side by side demo between the onboard DAC and the Codex.
The difference was clear.
I also can say that the Schiit Gungnir or Yggy should provide approximately the same level of sound quality.
To be fair the onboard DAC of the Node isn't bad considering the price it sells for and you get network connectivity.
Bob

You are asking about clarity and soundstaging. My first question is, are you using room treatments? 
You may benefit from a DAC, but your room is a major factor in obtaining focus, imaging, and soundstage.

I'm not really doing any room treatment nor know how to do it.

I have hardwood floor and will not be able to put carpet or rug on it.
I have tray ceiling with a ceiling fan. And to make things worse, I have window with blinds to the left of the system because it's in my family room.  And I have open kitchen behind my family room.  So, it's definitely not an ideal listening environment.