Anyone try rolling op amp in Topping D50s?

Hello,

Have a Topping D50s and would like a bigger soundstage.

As I understand it has a swappable buffer op amp, that currently has a LME49720 op amp. Any suggestions for an op amp in this unit's buffer stage?

(Has ESS9038QM DACs and OPA1612 Soundplus in I/V stage if I understand correctly?)

Any suggestions/advice appreciated?