Have you looked at McIntosh? A hybrid MA1200 would be killer with those speakers and have all the power yet the smoothness of the tube front end you are looking for. Plus they have looks that kill!
https://www.mcintoshlabs.com/products/integrated-amplifiers/MA12000
If you are not a McIntosh Autoformer fan then look at their MA352 which is another hybrid of theirs that has big power and is aesthetically stunning! Here is a good review on it where the reviewer has Magico A5 with it. Email him and ask any questions on how the amp pairs with the Magicos
https://www.soundstageaustralia.com/index.php/reviews/462-mcintosh-laboratory-ma352-integrated-ampli...
Good luck and have fun with those beautiful speakers!
https://www.mcintoshlabs.com/products/integrated-amplifiers/MA12000
If you are not a McIntosh Autoformer fan then look at their MA352 which is another hybrid of theirs that has big power and is aesthetically stunning! Here is a good review on it where the reviewer has Magico A5 with it. Email him and ask any questions on how the amp pairs with the Magicos
https://www.soundstageaustralia.com/index.php/reviews/462-mcintosh-laboratory-ma352-integrated-ampli...
Good luck and have fun with those beautiful speakers!