I can't speak about the PS audio but am breaking in the Modwright LS/PS combo right now.My LS had to be sent to be modified to accept the PS and returned a different beast.The break in period is some 200 hours,i am somewhere around 150 but the most immediate response was impressive and continues to open up.The soundstage has has taken on a pyramid -like depth,revealing the layers of music,rising like a staircase.It may be the audio equivalent to time laspse photography,as you would see a flower bloom in fast motion the detail of the music was transformed.You hear into the music,rather than at the music.It really draws you in on a well recorded cd or sacd.The resolution on vinyl is stunning as well,a little harder to describe due to the "one of a kind" nature to each recording,but continues to amaze.The bass response is,well,if you like bass,this is mothers milk.I think the bass response is still finding it's path.I think this combo of the LS/PS craves to be played loud.I am moving all my gear to a larger room before i go deaf.I am using the BAT vk 75 se which also uses the Russian 6h30 tubes and these three units are really starting to communicate.The Bat is new as well and is not yet reaching optimum performance.The speakers are Sonus Faber Cremona's and are responding well to this combination.The choice of going with the power supply upgrade is proving to be a really thrilling audio experience.This not only takes it to a whole new level but IS a whole new level.