I own a P3A modified by Dan Wright. I had P1A but got rid of it as it seemed to offer little improvement with no chance of speaker correction coming up soon (mine are Aliante Moda). I very much like what I am hearing through my P3A, but I must agree with Nicks that PT has lousy internet support. They never update, even after repeated promises of a "major" update from Mark Schifter. Also, their California-based repair facility is notoriously lame. My P3A is very good but has this "clicking" problem, induced by EMI. Mark at PT promised a free repair, but due to several horror stories of those who sent their units to PT's Cal repair centre I decided against sending in my unit. I understand that this company is still experiencing some growing pain, as its market seems to have exploded especially in Asia, and am willing to cut some slack. But I sure wish PT will get their acts together soon. As far as the quality of their gear goes (and I only mean P3A), I have no complaints though.