I can not comment on the dp6,but one of my issues in using the up4 was in setting up, it was not as user friendly as prior vpi tonearms tha I have used... The dp8 is easier to tweek,with a very solid base that allows you to adjusts azimuth much easier and VTA on the fly...
I AM A DEALER for the new ANVIL TURNTABLE I was asked to demo my new DP8 with zyx universe on this table and was able to have it up and singing in only minutes..
Dennis