The simple solution that will get you truly awesome state of the art bass is a Distributed Bass Array. A DBA is simply four subs distributed asymmetrically around the room. The number of subs and having them spread around is far more important that which subs are used. So this method allows you to buy four moderately priced subs. Most of us have only about $3k in our complete DBA including the amp.
Here is mine. https://systems.audiogon.com/systems/8367 This is just one way it can be done. The easiest way is to just buy the Audiokinesis Swarm system for about $3500, although it sounds like you might be in EU land, no idea about shipping. You can also simply buy any four powered subs. So that takes care of bass.
Now the detail problem. I don't see any of your components being known for flat, dry or shrill sound. For sure it is not coming from your front end, which is superb. Don't mess with that! But I don't see wire mentioned at all. So the answer could be as simple as spending the rest of the $6k on good used Synergistic Research interconnects, speaker cables, and power cords.
Never heard Maggies myself, but a lot love em and they are very well regarded in spite of as you noted not always being the easiest to drive. You can spend an awful lot of time and trouble trying to find the amp that can make difficult to drive speakers sing. Some enjoy doing this. Not me. I would rather stick with easy to drive speakers knowing it frees me up to find the very best amp without worrying will it drive my speakers.
In that vein you might want to listen to this guy, who absolutely loves his Maggies but look at the way he talks about his Tekton Double Impacts.
https://www.youtube.com/watch?v=7RxRTFx6Cd0
He starts talking about his Maggies and Double Impacts at 4:45.
Here is mine. https://systems.audiogon.com/systems/8367 This is just one way it can be done. The easiest way is to just buy the Audiokinesis Swarm system for about $3500, although it sounds like you might be in EU land, no idea about shipping. You can also simply buy any four powered subs. So that takes care of bass.
Now the detail problem. I don't see any of your components being known for flat, dry or shrill sound. For sure it is not coming from your front end, which is superb. Don't mess with that! But I don't see wire mentioned at all. So the answer could be as simple as spending the rest of the $6k on good used Synergistic Research interconnects, speaker cables, and power cords.
Never heard Maggies myself, but a lot love em and they are very well regarded in spite of as you noted not always being the easiest to drive. You can spend an awful lot of time and trouble trying to find the amp that can make difficult to drive speakers sing. Some enjoy doing this. Not me. I would rather stick with easy to drive speakers knowing it frees me up to find the very best amp without worrying will it drive my speakers.
In that vein you might want to listen to this guy, who absolutely loves his Maggies but look at the way he talks about his Tekton Double Impacts.
https://www.youtube.com/watch?v=7RxRTFx6Cd0
He starts talking about his Maggies and Double Impacts at 4:45.