I used to own Olympica 3 for many years and now own Amati. They are pretty easy to drive. My preferred match is Audio Research. While warm and extremely natural they are more balanced like real music than Mac (it will take away the dark veil). Provided your musical emphasis is not at head banging levels, I would check out a used Audio Research VSi 75. I am using a ARC Reference 160S.. but in triode mode only 70 wpc and they can play much louder without distortion than I would ever consider playing them.
The other difference is you will get more natural and nuanced bass… plenty of it. But, not the artificial slam typical of solid state amps.
If you choose solid state, then you will need a lot more power. Consider a used Pass 150watt amp.