Personally, I would not.
I have been a Pass fan for frothy years. First moving from Pass preamps, which have never been nearly as good as their amps, to Audio Research. Then moving to Audio Research.
Pass makes great equipment. But most folks move towards more natural and musical gear over time. So, away from solid state and towards tubed gear… so, towards Audio Research, Conrad Johnson… etc.
But, it is completely a matter of taste. I would audition first. The Ref 6 is a world class preamp.