Transfiguration Temper Supreme cartridge loading


I'm trying to optimize the cartridge loading for my Transfiguration Temper Supreme (which has a 7 ohm impedance) with my Spectral DMC-20 preamp with internal phono stage. There seem to be benefits/trade-offs for the three best settings I have found: 10 ohms, 30 ohms, and 100 ohms.
10 ohms seems to give the most detailed, airy presentation, but with about half the gain, requiring me to turn up the volume control half-way just for reasonable sound.
30 ohms loses a little bit of the realism, but is still pretty open and detailed.
100 ohms loses more of the airiness and detail, but seems to have a better soundstage.
I'm tending to go with the 30 ohms, but I might prefer the 10 ohms if I didn't have to go so high with the preamp volume control. I've seen all kinds of recommendations (including from this forum) regarding the optimal setting. I am getting confused and need some guidance.
ctlphd

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