I think that a resonance at about 8.7Hz is not bad. It is still within the acceptable range. I think that with a high mass arm, you would be better served with the Koetsu Onyx Platinum, which has a compliance of around 9cu, instead of the Lyra with 12cu.
If you want a cartridge with a perfect match for that arm, get a Denon DL103R. It is not as good as the others, but is still very nice, and costs less than $300. A 16 gram arm is spot-on perfect for that cartridge.
If it were my choice, and I had the money, I'd go with the Koetsu. But I think that the Onyx is a little "cold" sounding, and the Rosewood Platinum Signature has better warmth, and is lighter, so that would improve your mass/resonance figure. I vote for the Koetsu Rosewood Platinum Signature.
If you want a cartridge with a perfect match for that arm, get a Denon DL103R. It is not as good as the others, but is still very nice, and costs less than $300. A 16 gram arm is spot-on perfect for that cartridge.
If it were my choice, and I had the money, I'd go with the Koetsu. But I think that the Onyx is a little "cold" sounding, and the Rosewood Platinum Signature has better warmth, and is lighter, so that would improve your mass/resonance figure. I vote for the Koetsu Rosewood Platinum Signature.