Not a Thiel owner but I did own the CJ MF200 amp and currently run a Pass Labs X150 amp. BTW using a Eminent Technology 8A planar speakers which use 1st order crossovers also, and lower sensitivity similar to Thiel.
The CJ amp is warmer in the mids. The bass is strong but not super tight. It images well. The high end is a little soft. The Pass Labs amp has a different sound, not a tube like sound. Very clean and fast and detailed. Both amps will have no problem driving the Thiels. The CJ puts out 250 watts a side before clipping into 8 ohms, and no problem with 4ohms. The Pass amp - even though rated at only 150 watts a side will also put out 250 watts in 8 ohms and no problem down to 1 ohms. You may want to consider trying a Crown XLS amp
The XLS 1500 , 2000 or 2500. They are inexpensive and sound really good for the money maybe better than the CJ. I lived with that CJ amp for many years. My 1st audiophile amp. Happy listening!
The CJ amp is warmer in the mids. The bass is strong but not super tight. It images well. The high end is a little soft. The Pass Labs amp has a different sound, not a tube like sound. Very clean and fast and detailed. Both amps will have no problem driving the Thiels. The CJ puts out 250 watts a side before clipping into 8 ohms, and no problem with 4ohms. The Pass amp - even though rated at only 150 watts a side will also put out 250 watts in 8 ohms and no problem down to 1 ohms. You may want to consider trying a Crown XLS amp
The XLS 1500 , 2000 or 2500. They are inexpensive and sound really good for the money maybe better than the CJ. I lived with that CJ amp for many years. My 1st audiophile amp. Happy listening!