In the mean time
My fav amp was a Kinergetic KBA 75, but I killed it swapping out power cords before the caps drained. Since then I have owned tube amps, and many class Ds. None of them compared, BUT...
About 7 months ago I bought Ric Schultz's EVS 1200 (dual mono XLR only class D using newest IcePower 1200AS2 modules, which he then mods
MSRP ~ $2300
I use it direct from my Oppo 105 with upgraded Linear Power Module and upgraded IEC with Furutech rhodium and heavy gauge pure silver wire (both from Ebay(. He offers a 30 day money back
You might keep it as a backup, and to listen to shhould you spend the $$$ to repair the Krell
hth