Choice of preamp is very personal. Some are super clean, some give a warm or dirty edge.
Best you can do is listen to demos where they are playing the same sort of music you play.
There are plenty of very good choices - East, Darkglass, Glockenklang, Aguilar, Nordstrand, EMG etc etc
Some work with all pickups, others (some of the EMG models) only work with their pickups.
What pickups are you going to install? Is the current preamp a 2 band or 3 band? How many control knob holes has it got? Do you care if more holes might be needed?