I heard C4's w/ Ref 110's and they sounded flat. I think you need more drive than that.
If you're after tubes I'd look at VAC. I have two Phi 200's I'm selling which I used to drive some 83 db electrostats. I tried a lot of amplifiers and they were the only tube amps I ever found that could do it. Your Sapphires are much easier to drive than those were!
The ASR would be a good fit but they are really hard to resell if you ever went in another direction.
I don't know about the EAR but if they're not top notch with some serious cahones you're wasting your time.
In SS you have many good choices as mentioned by others before me.
If you're after tubes I'd look at VAC. I have two Phi 200's I'm selling which I used to drive some 83 db electrostats. I tried a lot of amplifiers and they were the only tube amps I ever found that could do it. Your Sapphires are much easier to drive than those were!
The ASR would be a good fit but they are really hard to resell if you ever went in another direction.
I don't know about the EAR but if they're not top notch with some serious cahones you're wasting your time.
In SS you have many good choices as mentioned by others before me.