I just made the switch from Audirvana to Jriver. There were some bugs to work through but overall both of these programs sound very good to me, better than Pure Music. I prefer the Jriver UI and like the fact I do not have to rely on iTunes any longer. However, in the future I see myself going with a solution like the Sonore Rendu and being Linux based will probably mean switching to another software program.
Just for reference I am currently using an Oyen Digital 1TB HD connected via FW800 to a MacMini with a WyWires USB cable going to an Audiophilleo AP1 with Pure Power and then using a BNC to RCA adapter to connect directly to my Lessloss DAC bypassing the SPDIF digital cable. I did some upgrades to the MacMini as well.
Just for reference I am currently using an Oyen Digital 1TB HD connected via FW800 to a MacMini with a WyWires USB cable going to an Audiophilleo AP1 with Pure Power and then using a BNC to RCA adapter to connect directly to my Lessloss DAC bypassing the SPDIF digital cable. I did some upgrades to the MacMini as well.