This comes down to the goal. I found the Soloist better than the WA22, LF, B22 and GS-1 I had in house. Terrible match for the LCD-3 and HD800 though, too laid back. Of the amps I've had only the Peak really worked for both assuming you want an engaging sound without tipping into bright, shouty or fatiguing. Peak with the Hytron 5692 for the LCD-3, Sylvania 6SN7W for the HD800.