I’m with GHD, if you are going to stick to separates a great preamp is a must. But the speakers are what “speak” to you. If it were me, I would audition a few pairs of speakers with your current setup, then maybe a different pre. The Aleph is a nice amp, but not huge on the power side of things, so an efficient speaker is a must.
What is your budget? Maybe time for a full reset, update everything, maybe a great integrated and go from there? Might be easier to sell with a new set of speakers, simplifies everything. Less cables, etc.
Regarding the rest of the system, get the front end dialed then go from there.