A late thank you for sharing this chart.

Woah , look at dat ifi nano position lol.
I wonder how ifi micro will fared in this chart actually, still weighting if i should get one or just get used uberfrost (awesome deal at 250$ i'd say) to use with BW.
Of course i planned to get yggy or reDACTed later down the line but i need proper dac to set a system up with BW now.

Couple of DACs I've had success with:  The APL NWO and recently a heavily modded Lite DAC60.

Now the NWO is $20K+ but the Lite DAC60 with mods (most important Mundorf Supreme Silver/Gold/Oil coupling caps and better tubes '75 HG 6N23p are my favorites) - is very competitive.  Stock excellent for around $600 + another $500-$800 in mods outstanding!

A few features on the DAC60:

True R2R PCM1704K 24bit ladder DAC chips.
True (not an opamp buffer) 6922 tube output section
Separate PS for Analog and Digital Sections

Here is the thread I started on Headfi for the mods:
http://www.head-fi.org/t/740362/lite-dac60-pcm1704-r2r-tubed-dac-mod-project

This thing is sooo sweet sounding, yet detailed and resolving, extended tight bass and wide and deep sound stage.  The best is the rich natural tone - I listen to this for 8-10hrs a day in my office system.  Just captivating.  Better then any SS DAC I have heard yet.

Feeding it with a modded Melodius MX-U8 (Audio Sensibilities silver ref 1.5M RCA SPDIF), custom dedicated iCore 5 WIN7 Pro music server.

Dang, that Lite DAC60 sounds interesting.  I see it available from a reseller in China for $464 USD.  Is it available from US resellers?

I bought mine on Ebay from hifi-china.  It was $650 shipped with buyer's protection.  The thing about R2R DACs, especially with real tube outputs, they have rich tone and are very pleasing to listen to for long periods.

Here are some great articles that explains Resistor ladder DACs vs the sigma-delta and multi-bit newer designs.  All have issues.  The R2R's are very expensive and difficult to make, the S-D have major filtering issues and the Multi-bits have on silicon opamps.

http://www.mother-of-tone.com/conversion.htm
http://funwithaudio.blogspot.com/2012/01/today-in-electronics-everything-is-made.html

With the DAC60 you do give up a few things - like no I2S input, no DSD native processing (I use Foobar conversion to PCM), and limit to 96K sampling and 24 bit depth.  But how many folks have 192K - true Ultra Hi Res downloads?  Or true (not resampled) DSD files?

What you get is amazingly detailed and smooth sound.

Some of the very best DAC's use R2R ladder DACs - like Audio Note, Total DAC, MSB, Audio-gd (Master 7 - uses the same PCM1704 but twice as many), Zanden, etc...