Until just recently, I have had the VPI Classic 1 with the PS Audio GCPH combination in my system and the cartridge that I have been running is the Dynavector 20x VPI version (1.0 mv). While the combination worked well, I was concerned that the PS Audio GCPH was the limiting factor in the setup and started doing some phono stage upgrading. Based on testing with a combo of a Graham Slee Reflex Era Gold and Graham Slee Elevator EXP and testing with a Simaudio LP 5.3, I confirmed that the limiting component in the setup was definitely the GCPH. I am getting amazing bass as well as treble extension out of the Simaudio LP 5.3 and the difference in the soundstage is nothing short of astounding. Where the GCPH always provided great soundstage width, it always seemed somewhat flat for depth. However, with the Simaudio LP 5.3, the soundstage depth just opened up and really provides a great 3 dimensional presentation and makes a big difference in the vocals as well.
So, with all that said, I don't think you could go wrong with the Dynavector 20x VPI version. But you may ultimately want to take the GCPH to the next level as well.