I have the 2100 pre and love it. Does what it's supposed to do and looks good doing it.
My setup is this:
FLAC->SB3->Perpetual Tech P1-A (with SOCS)-> PT P3-A....
... P 2100-> Integra ADM 2.1-Rocket Sig 750s
if the AV123 forum ever comes back I'll post a link to my comments.
I also use the phono input with an old Pio TT - nothing HQ, but I can spin my vinyl a few times a year.
In addition, I use an external SB16 USB sound card to stream Pandora and NF from a laptop into the P3 DAC and then to the 2100. Again , not very HQ, but convenient for LQ sources.
Let me know if you have any questions.