Just because you believe it doesn't make it true. None of what you're suggesting will make them sound better. You just need to get different speakers. Different sounding cables/wires? Come on, man. Don't be willfully ignorant.
Crossover and Wiring Upgrade
Has anyone upgraded their Sonus Faber crossover, internal wiring, and binding post? I'm a cable and amplifier believer as not all cables and amps sound the same. Using that same mindset, I believe that upgrading the crossover and internal wiring would also yield positive results and keep in my speakers longer versus upgrading.