@audioman58 +1 So, lets say you're only changing out parts while keeping stock values. You're not creating some Frankenstein monster here, and you could add parts in small increments so as to only have one variable at a time, don't let the naysayers deter. You should also understand exactly what you're trying to improve, going in there willy nilly and changing out parts not good. Generally, these boutique parts are going to improve resolution/transparency, may also affect tonal balance, timbre. You also need to be aware crossover changes may expose some new flaw elsewhere in system, synergy may prove to be problematic. Now, all this assuming you have experience with soldering, modifications. If not, practice with kits is a good idea.
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.