Based upon the website you provided, ranked according to personal preference:
1)Schiit BiFrost
1)Audio-gd 2.1
2)Peachtree DAC iT
Schiit and Audio-gd are tied, with a slight preference to Schiit for the 5 year warranty vs. 3 years. Both units are future upgradeable. To help your decision, I believe the Audio-gd is more "listenable and forgiving" (less fatiguing/detail) than the Sabre DACs "detail and dynamics" (more fatiguing/detail)in Schiit and Peachtree. It's a tradeoff.
Another note, the Sabre DACs are brutal when it comes to bad recordings or low res music (including CD FLACs), so judge your current and future music library accordingly.