Comparison of latest DAC chips


I own a Bluesound Node 2i which greatly improved sound after I added the Cat 6 cable.  I do not own a separate DAC but am told it would be the next step improvement.  I have done enough reading that it appears the two latest chips are the Sabre or ESS ES9038PRO and the AK4499.  The brands I have looked at are Sabaj d5($469) and a Topping D90($699).  I saw a great review on Audiocircle of the Sabaj D5 which is now a year old.  The Topping D90 is newer and I hear the build quality of the Topping as well as customer service are both better.   Other brands cost more and most don't use these new chips. 

Is there a difference in how these chips sound?  I would appreciate any comments. 
128x128daledeee1

DCS Ring dac converters are also similar to the newer top level stuff from Burr Brown and Analog Devices, being hybrid, which are part R2R and part DS, (Delta Sigma, 1bit, Single Bit, ESS, Bitstream) or whatever other pseudo names DS has.

Burr Brown/ Texas Instruments, Analog Devices now are doing "hybrids" with their better d/a converters, 4 or so bits of R2R and the rest DS. This makes them more expensive to make than DS but said to sound better, yet still no where near as expensive to make as full R2R was, the reason R2R was dropped in the first place and 1 bit DS (delta sigma) took over, because it was very much cheaper to manufacturer than R2R.

But things seem to be going full circle again and R2R is being shown for what it is, bit perfect for converting PCM, where DS is just a facsimile.

And many Dac makers are now doing full R2R again in "discrete form", and the results of the good ones are better than the last of the great full R2R converter chips from AD Texas/Burr Brown ect ect

Cheers George
@mtdining It's hard to take stuff posted by people who take extreme black and white positions seriously.  


Just search read and educate at the way PCM is converted in the best possible way.
Cheers George
With bandwidth and sampling limitations, ringing and aliasing artifacts, all digital is only a facsimile of the original. R2R is no better than delta sigma in this respect, and has technical limitations of its own. 
Since most studios use Delta Sigma ADC's to create  PCM I'll guess the best way to convert it back is with Delta Sigma DAC's. The process used whether R2R, Delta Sigma,  Proprietary doesn't matter as much as how well the DAC is at getting a nice quiet accurate signal at the analog output.