Why not try changing cables from a copper/silver hybrid (Q-10)to all copper? Since you have Synergistic Res. IC, try their speaker cables (I have the Signature 2 and find the highs to be smooth).
If that doesn't work, I would be inclined to replace the Paradigms rather replace drivers and crossovers.
Good Luck, Dave
If that doesn't work, I would be inclined to replace the Paradigms rather replace drivers and crossovers.
Good Luck, Dave