I'm thinking the same. In my recent audition, I got a chance to hear it with usb, Pi-based streamer, and proprietary streamer. None sounded excessively laid back. I even feel very resistive to use the term "sleepy". USB loss was too subtle for me to bother. I might be more motivated to use non-usb solutions if I go for Spring 2. But I am not a usb-nervosa type of person.. so should digress. This is actually consistent with my comparison. Great insight. To my ears, Spring 2 might be a little less aggressive than Spring 3. Neither was sleepier or less snappy than BF2 or Gungnir A1 by any means to my ears. Spring 2 sounded quite euphoric without giving up sheer technicality (My unhappiness with BF2 was initiated from the audition of Spr 2, which eventually ended up with breakup). Spring 3 added it healthy amount of analytic nuance, effortlessness, and some dryness by comparison. All done in harmonic ways. I confirmed this delta by hearing Spring 2 again after Spr3 audition (both happened within one month and with Stax downstream). Spring 3 sounded a little more matured and generalist-ish to me. Price aside I might take 3 over 2 because it's closer to what I'm looking after. Realistic costs factored in, my verdict will flip. TBH I like them both for what they are respectively. All these comparisons were from NOS mode + software upsamplers. I do have a preference toward slow-min phase + upsampler combo even in OS r2r dacs. PS. Mods please move my post to impression thread if it derails the thread too much.