Holo Audio Spring DAC LEVEL 3 Vs. iFi Audio Pro iDSD DAC and Music Streamer


I want to up grade my DAC's and I'm looking at Holo Audio Spring DAC LEVEL 3 and the iFi Audio Pro iDSD DAC and Music Streamer . Both are the same price ($2499),both can be tube or SS I believe. Both have received stunning reviews. Which one would be better with tube amps, which one better with solid state? Has anyone heard one or both. Is one more analytical then the other? Image, sound stage and depth, which should sound better with Martin Logan's electrostatics? Am I missing something, are there other DAC / Streamer's under $2500 I should know about?
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How can you forget the Benchmark DAC 3? The SMSL SU-8 is also super close to the DAC3 at a considerably cheaper price point. 
 
If you want to hear every nuance in your music, these are amazing devices.