What's a real upgrade from LuminT2

With the Lumin, specifically what would you like to improve?  Are you looking for improved clarity, better soundstage/imaging?  What is the shortcoming?  There is a fair amount of compromise at that level.

An "upgrade" could be a lateral shift to something that is a better compromise for your tastes or could be a step forward.  It really depends on what you want to accomplish.  

The obvious alternatives are the Chord TT2, Audiobyte Hydravox, Rockna Wavelight and Bricasti M3.  Each has a distinct and different sound and depending on features will range between $4.5K and $7K MSRP.  

For a clear step forward you would look at the Chord Dave or TT2 with MScaler, Weiss 501/502, Bricasti M1 or Rockna Wavedream Edition.  Depending on features, these will range between $6.5K and $11K.  

I have another thread breaking down performance of these DACs which is titled "DAC Shootout starts this weekend."

I believe PS Audio has announced it's last update for the Directstream DAC.  I replaced my Direct Stream first wIth an Auralic Vega G2 which was better.  I then replaced this with the Mola Mola Tambaqui which was again better.  All are streaming DAC's.  Enjoy the hunt!

Lumin X1.

ozzy

Raspberry Pi ala Allo.

Yep , first step I would take is audition external DAC.  Mcintosh D100 over on ebay for $1.2k.  Be a cheap way to try something out that you could easily sell.  Wadia 321 over on Usaudiomart which is basically the same thing.