S/N Ratio for Rega Brio-R?

I am considering a Rega Brio-R to match with an Apollo-R CD player and a pair of Totem Arros or Ohm Microwalsh SEs.

Interestingly, I can't find the signal-to-noise ratio for the amp in any Rega collateral or industry reviews.

How important is this spec in judging the sound and build quality of the Brio-R?