Step-up from Plinius SA-102?

I use Plinius SA-102, it's a great amp, but i want more attack and control. I've also tried the SA-250, but it wasn't what i was looking for!
I've been recommended to look into Krell. I've heard the fpb 250 mono's at demo shows and found them somewhat fatiguing quite fast!
I also got the impression they are not suitable to speakers which easily can be provoked, to sound a little harsh with bright sounding equipment?
Speakers used are an advanced small serie speaker, it was never put in real production. Mostly for the reason, they were to expensive to build. They are very much alike Avalon's Eidelon and likes in Kharma range.
A 2-way monitor, with ceramique's from thiel and partner.
Each bass-module employs a 10inch tc sounds
(wisdom audio use these) bassdriver cutting in at 100Hz.
They truely has a sensivity as low as 83db.
Impedance is nominally 4ohm but never below 3ohm.
They respond directly to what you put in the chain!
Other links in the chain is,
Meridian 588 and Classe 47.5mk2.
I have decided to first concentrate at amp!
So, anyone with suggestions?
I'm most thankful to anyone sharing info and thoughts!
Ok, thanks for looking in!