Hi there Quadpatch!
Indeed a nice work!!!
In addition, what would be very useful for certain users (as for instance for me :wave: ), would be a column saying, wether Analogue-to-Digital-Conversion is supported, or not. The Furutech ADL GT40 and ADL Esprit have this feature, for instance.
It is important to me, as I do a lot of Vinyl back-up up to 24/96 - files. And the maket for hi-fi-gear being capable of this, is very thin. Until recently, I was pratically stuck to portable musicians gear. I used a E-MU 0404 USB for this purpose, and was quite happy with its sound performance, however, I damaged it... (by connecting it the wrong way to my linear power supply, I am still kicking my own behiind for that...). Anyway, this is the moment for an upgrade, rather than a downgrade, and I am looking for A/D - USB - gear, made with HiFi in mind.
I started a little comparison over there at the head-fi forum:
http://www.head-fi.org/t/606173/comparison-adc-interface-for-hifi-recording-1000-usb-pre2-adl-esprit-rme-babyface-adl-gt40-other-analogue-digital-usb-convertsers-experiencies-comparisons-reviews
However, there might be other devices in your list, that have the feature, of converting analogue to digital. So, if you still have all those specs with you, it would be indeed extremely useful to see this in your table!
Cheers!