I Love my PX-2. I have several cartridges (Koetsu Rosewood Signature, Shelter 901, Accuphase AC-2, Dynavector Ruby Karat and ZU DL-103R) all mounted on Sumiko Headshells. It is so easy to change out cartridges with the PX-2. Easy to set the tracking force coupled with VTA on the fly, make it fun to compare cartridges. I also have a PX-3 that I use for shows. Same headshells work on both. I also have a highly upgraded VPI Aries Extended with JMW 12.7i arm that sure is sexier, but I truly can't tell much difference in sound. If I had to pick one to keep, if I could only keep one, it would be to keep the PX-2. I understand there is a PX-1, but haven't seen one.