IMO, a new or used Innuos, Lumin or Auralic would put you far ahead of of the Blue Sound.
I'd also strongly recommend the Uptone Audio EtherRegen switch (to get rid of jitter-causing noise) placed just before the streamer. since the rest of your rig sounds pretty solid.
You could probably do both for a total under $2k.
Then some day spring for a newer DAC.