Good day everyone, 
  
I am in the process of purchasing a new DAC.... So Far, I bought a pair of Sennheiser HD800 and a WOO Audio 6 SE headphone amp. All my music is on Apple Lossless on an external hard drive. 
  
My last step is the purchase of a new DAC..... 
  
AUDIO-GD is what I have in mind so far.... This company has a lot of fans on Head-Fi, but it doesn't seem to be the same thing here.... 
  
The DAC I will buy should last at least 10 years.... maybe more, like my HD800 amd my headphone amp. 
  
As I will not have the chance of listening to the DAC before I buy it, I seek for your help... 
  
I am thinking of the Audio GD NFB 8 or REF 5 or Wyred 4 Sound Dac 1 or 2... 
  
I'd like to have your opinions on that... 
  
NFB8 uses the Wolfson 8741 DAC 
REF5 the 1704uk chip 
and W4S the Sabre 9018 chip... 
  
Knowing that I have a pair of HD800 and a WA6SE tube amp... which DAC would you buy  
  
I thank you for your time.... 
  
Denys