Best sounding input relays

[dcathro]

I am going to be rebuilding a solid state preamp for a friend.

It currently has cheep chinese Omron 12vdc input relays that I want to replace, as they will limit the sound quality.

Can anyone recommend what the best sounding (most transparent) brand of relays are?

What do the top companies like MSB or Dartzeel use?

Thanks

David