I had a Krell FPB600 and it was excellent with the Andra. I decided to keep only 1 amp and sold it. In hindsight it was a big mistake.
To get the best sound from the Krell, I had to leave it on 24/7 so it gets very hot just in idle. ... and yes the SF Line 3 gets very hot too with 12 tubes. I guess my problem is I don't want to sacrifice anything going to a SS integrated so maybe I should just crank up the AC in the summer :-)
My biggest concern using an integrated is the lack of current to drive the Andra so I will expand my search to SS mono amps too.
I don't like the sound of Class D amps either ... but will check out MF.
Thanks for all the imputs.