Solid State Power Amps

Especially at this level it really depends on what specific improvements you’re looking for and what sound characteristics are most important to you.  Without that info this is just a pure crapshoot of recommendations of amps other people like that may or may not have anything to do with what you’re looking for. 

Anything with a strong power supply. Everyone is suggesting along the same lines- large stiffening caps, lots of output devices and a good sized toroidal transformer. The Coda line is what I would take IF if didn't want gobs of power on tap for lower efficiency monitors. 

You have what you need for a tube amp, splurge on some SS and see how it goes. You really can't lose on an S5.5 if you don't like it sell it and you will know better what it is you would like a little cost on the S5.5

yyzSantaBarbara,

but have you heard the 861 amplifier that's a whole different league better than the 860A V2? I have heard the 861 and it's much better than the 860 A V2.

I've owned the PrimaLuna EVO 400 and a couple different Pass amps. While perfectly sufficient I prefer the all ARC REF system I'm running now. Speakers have been Wilson Sasha and now Harbeth M40.1.

@zuesman 

but have you heard the 861 amplifier that's a whole different league better than the 860A V2? I have heard the 861 and it's much better than the 860 A V2.

Last Friday, driving back from LAX airport (a nightmare). I stopped by a dealer on the way home. I wanted to hear the 861 with my Yamaha NS5000. Unfortunately, they had closed early that day. I am heading down to LAX again in 4 weeks and will try to make a stop at the dealer once more.