Dynavector 20x2 High or Low Output?

I have a VPI HW-19v4 table with a 12.5 arm. I am currently using a Denon 103r with a Bob's Cinemag Step-up. I have a friend that is selling a like new 2.8mv 20X2 for $750. Should I hold out on a Low version since I have the Step-up or get the HO version and lose the Step-up? Has anyone A/B'd the Denon to the 20X2? Finally, what are your thoughts of this cartridge is it a worthy upgrade from the 103r?