Hi @falmgren, It doesn’t look like the consensus here is that you should improve your speakers’ xover. As you are serious about this, please check @elliottbnewcombjr ’s post above.
Changing the xover components for more expensive parts (I don’t think anyone of us here has evidence of which would be the "better" parts for that specific speaker!) could change the sound -- not necessarily better, but different.
It’s reversible, so go ahead, but stick to using exactly the same spec components. Someone above recommended Mundorfs and I too have had great experiences with them (the oil variant)