denon dl 103 w/ origin live silver mk II: help

I recently purchased a rega p3 with a origin live silver mk II tonearm mounted on it. It is hooked up via a musical surroundings mk I preamp. I had previously had a planar 3 with a denon DL 110 and was very pleased with the sound. So with the new deck I figured that I should go with a new cartridge. Enter the denon dl 103. No matter what I have tried (changing load settings, adding mass to the head of the tonearm), nothing improves the sound. It is shrill, sibilant, and fatiguing. I have had quite a bit of experience with mounting cartridges and always produced excellent results. I have been very pleased with rest of system sound wise. Is it just a bad match with my tonearm or do I just need to let it burn a lot longer. Suggestions???