Tell us what the output voltages and the impedance's of the carts are so we can make some suggestions.
Dear @dhcod : With out doubt and almost at any price you can't do better than the Denon AU-340 that will works really fine with your cartridges and almost any vintage or today ones:
Regards and enjoy the MUSIC NOT DISTORTIONS,
Btw, there are many units on ebay, higly recomended and if you make an internal rewiring and change the input/output connectors for say WBT then your unit can't be outperformed.
Dear @billwojo : Yes, Tamura transformers are second to none. Today SUTs using Tamura transformers comes with an over 1K price tag.
The ones used in the AU-1000 were customer made and exclusively for Denon. The 1000 has a FR: 5hz-200khz and weigths over 12 kg. I still own it, this is really the State of the Art in SUTs. Nothing less.