[sdiy] question - ripple tolerance

[mark s]

question-

are there desired pre-regulator and post-regulator ripple voltages maximums 
(or minimums..) that are preferred when designing a high quality audio 
power supply ?

i am under the impression that 1V pre-reg and 1mV post-reg (the reg here 
has a ripple reduction of 60dB) are sort of the norm.  is this on the mark, 
or what is a better value to shoot for?

mark