I had been happy with Rogue Cronus Magum II for 6 years.
But I doubt it will have enough power to drive your Thiel speaker.
https://www.audiogon.com/listings/lis9ibea-rogue-audio-apollo-solid-state
I recommend you to stretch your budget to get Apollo with 250W.
Or you can try out Crown XLS 2502 (725W for 4ohm) at 650$ from Amazon.
I got one to drive Raal Sr1a headphone which is also demanding.
It has a lot of headroom without hard edge.
https://forum.audiogon.com/discussions/best-headphone-under-10k
Thomas
But I doubt it will have enough power to drive your Thiel speaker.
https://www.audiogon.com/listings/lis9ibea-rogue-audio-apollo-solid-state
I recommend you to stretch your budget to get Apollo with 250W.
Or you can try out Crown XLS 2502 (725W for 4ohm) at 650$ from Amazon.
I got one to drive Raal Sr1a headphone which is also demanding.
It has a lot of headroom without hard edge.
https://forum.audiogon.com/discussions/best-headphone-under-10k
Thomas