I dont have a hd700, but i do have a beyer t1 before. Beyer t1 imo has Problems with the highs (hd700 too imo), and the combo with ifi idsd was not good.

The common problem with the amp section on both silver idsd and black label is that they sounded dry, and it can exaggerate the peaky highs to sibilant territory

The amp section on the BL version is less dry, but i would still categorize it as dry sounding. I wouldnt recommend getting just the ifi idsd black label for HD700. You are better off pairing it with iFi iCan Micro that has noticeably better amp section and less rough on the highs. Also, other than the 6khz peak, I personally have no qualms with the highs on the HD800 despite me being treble sensitive. HD800S has none of the peak. Therefore the BL is still a great pairing for HD800/S as mobile setup. Cant say the same about the HD700 or the Beyer T1 (metallic highs). Chord Mojo is a good alternative. The amp section not as powerful, but its smooth sound signature complements well with HD700. If I have a HD700 and have to choose between BL or Mojo, i'd go for Mojo. If I have other cans, i'd go for BL
Oh well, your mileage might varies, but from my experience, dont pair the BL with headphones that are rough on the highs.

This post has been edited by G_KeN: Feb 4 2018, 07:23 PM

Audio-gd R2R-11? 10 years warranty (1 year shop replacement warranty, 9 years repair warranty if im not mistaken), rm1599 from stars picker. It should be an upgrade over xduoo xp-1, and comparable to the schiit stack. (schiit modi 2 multibit + magni 3 costs around rm2k, whether u buy locally or straight from schiit website). I'd suggest u go demo the amp/dac at stars picker shop.

https://www.facebook.com/StarsPickerAudio/