Bass is the hardest thing to get right
If you move speakers away from a boundary to combat a bass boom then you are more than likely making the rest of the bass worse or less powerful at the very least but your hands are tied because bass boom is horrible to listen to.
I think an av pre amp is likely not as good as a stereo pre amp of equivalent cost.
However as it's all a game of trade offs I think I would trade that % of sound quality for the benefits mentioned and the ability to watch films as well.
I don't blame anyone else for not doing that though.
Other speakers to consider - I will add my list to this shortly
If you move speakers away from a boundary to combat a bass boom then you are more than likely making the rest of the bass worse or less powerful at the very least but your hands are tied because bass boom is horrible to listen to.
I think an av pre amp is likely not as good as a stereo pre amp of equivalent cost.
However as it's all a game of trade offs I think I would trade that % of sound quality for the benefits mentioned and the ability to watch films as well.
I don't blame anyone else for not doing that though.
Other speakers to consider - I will add my list to this shortly