Thanks for your kind words, @phusis
Yes, as far as I know the only drivers Mundorf makes are AMT’s, including some that are pretty long which could be used in line sources. I like _these_ AMTs but I’ve heard terrible AMTs too. I’m sure there are AMTs as good for a lot less than the Mundorfs now but not an expert. Beyma is a brand that I see recommended often, especially their horn loaded model.
The Dayton RSS265HF’s were recommended to me, and they were an excellent choice. About half the price of comparable ScanSpeak 10" aluminum woofers with very similar performance. I have no complaints about their distortion either. I used 2 x 10" because I wanted to keep the overall cabinet size down to just larger than the bookshelves. Also, really wanted to put them as close to the floor as possible. The distance between the top woofer and mid-woofer is negligible at 250 Hz.

