i dont know what your experience is philly q, but mine with pot quality has been a bit mixed. in my hamer (dimarzio pups), i changed them to cts and noticed almost nothing. being dissapointed, i didn't change pots again.
but i had some spare cts pots, and threw them in my steinberger. i don't know if it was because i was upgrading a guitar with decent pickups in or not, but i did notice an increase in clarity that time.