DAC upgrade suggestion


I am currently using a Audio-gd nfb 3.1.  The information below.  I bought a Topping DX7 pro based on the good data in audio science review.com.  When I first use it, I can hear the difference immediately.  It is more dynamic, bass is more punchy, sound clearer.  It sounds great.  But after listening for a longer time, I feel a bit fatigued.  I can compensate it a bit by switching the tubes in my amp.  Then, I need to return the DX7 because the Bluetooth doesn’t work.  I plug back in the Audio-gd, and i can confirm it is not fatiguing.  It is less dynamic, but also smooth.  Now, I am confused on what I should upgrade.  Several Audio-gd DACs are reviewed by AudioScienceReview.com and the data is very bad, LoL.  I know the bad data doesn’t mean it sound bad, but should I avoid DACs with good data?  How should I pick my next DAC?  It seems R2R DACs maybe a good choice for me since many people says the sound is more analog-like.

http://www.audio-gd.com/Pro/dac/NFB-2/NFB2EN.htm
gte357s
It is more dynamic, bass is more punchy, sound clearer.  
It seems this isn't what you're looking for. R2R DACs or maybe the RME ADI-2 which has some EQ capabilities would be more to your liking. 
I bought a Topping DX7 pro based on the good data in audio science review.com. 

Those guys base every recommendation on measurements and not listening.
Actually, I like more dynamics, punchy bass and clear, transparent sound.  But the tricky part is, to a point that not to sound fatiguing.  It is more a feeling after a longer time of listening.  When I first hear the Topping dx7 pro, it sounds great.  But after maybe 30 mins, I feel it is too “noisy”, and I need to turn down the volume from my normal listening volume.  I guess this is called the synergy between the components.  I am using a Triode Lab 2A3 and Spatial Lab X5.  Both of them are very revealing.  It seems they match better with the Audio-gd.  I also try the Almarro 318 with the Topping, I don’t feel fatigue.  But I like the Audio-gd + Triode Lab More than Topping + Almarro.  
I think I have two top candidates:

1) MHDT Orchid
this has very good review by reviewer and the community.  People often comment it has a smooth, liquid sound.  
2) Audio-gd R7 or R8
this has rave review in 6moons with a blue moon award.  It is the same brand that I like, and hopefully with similar but improved sound signature.  Also, it is very flexible that I can choose a TDA1541 smoother sound, and NOS vs with over sampling.  
Forgot to mention, the Audio-gd has a in-house developed R2R chip, while the MHDT use an old TDS1541a.  Although the TDA 1541a has good reviews, but if Audio-GD do it right, a new technology should theoretically sound better.  And with the positive review in 6moons, I hope it means it is done right.  This is another pro to go with Audio-gd.