Well, since you brought my thread back to life, I wanted to post what I have settled on. As usual, my dealer was right. I ended up on 47k ohms. It has the most open sound. And the problem I was having before was that my system was bright due to my room. That's why the 47k ohms sounded top end loaded.
I also called Dynavector US representative and he said that the reason they put > 100 ohms as recommended is that you should at least have 100 ohm load and experiment above that. Unfortunatelly the confusion was due to the fact that several vendors and reviewers of the Karat cart. put the specs as = 100 ohms. Shame on them. just kidding.
Thanks,
Rob