Turntable or Cable Upgrade?

HI.

I have a Rega III turntable connected to a Krell Phono Stage. Both the phono stage and the YBA CD1 are connected using YBA Diamond interconnects. The Diamond interconnect on the digital side is beautiful, but the analog side is a bit edgy. I recently auditioned Cardas Golden Reference and while that cable has nice imaging, it is sluggish in the upper end. The rest of the system is connected using Straight Wire Crescendo. Any recommendations on the phono stage interconnect? For the sake of discussion..any recommendations on a turntable upgrade also?
The rest of the system is Classe CA 150 amp, JM Labs Mini Utopias, and dual Vandersteen 2wq subs.
The phono stage is not bad, it just cannot match the quality of the rest of the system. The issue may lie with the turntable, but I thought I would research the cable option also.

Thanks!