Just took delivery of my XA-5400es with Modwright mods. In fact, I ordered the Sony and had it delivered straight to Modwright.
I have it playing Dave Alvin SACD right now, and listened to CDs as well on it.
Wow! I recently had a Sony SCD-XA777es player. It was built like a tank, but the CD and SACD performance of the 5400es with Modwright mods is simply stunning. I spend most of my time listening to vinyl, and this 5400es has the organic energy of what I love about vinyl (not sure if it is the tubes?). Fluidity, musicality, transparency, dynamics, black background, large sound stage, layering, are the words that come to mind. I was nervous I wouldn't like it as much as my PS Audio PWD with Bridge playing hi-rez files....but even the CD via modded Sony keeps pace with PWD. Hats off to Modwright and Sony. Amazing what you get for a $1500 SACD/CD player and a $1995 mod package. I don't know why anyone would pay more than 5-10K for a digital front-end when you can get this.