what to upgrade in this dac?

[lightmaster]

dear all
i am planning to get my DAC modded (see picture) so far i have come up with some basic ideas.

output caps changed to mundorf silver gold
caps around dac chips from silmic and oscon to silmic II and elna cerafine
diodes replaced with Schottky Diodes

i am no expert so i would like to have your ideas on what would improve this dac, i will very likely get someone to do it for me, but would like to have your input before deciding what to do.

please ask any questions if you need more info about the circuit

thxs a lot

francesco