Which Cartridge / tonearm has the truest dynamics?

I have heard a lot about the London Decca Reference but nothing here on Audiogon. The Lyra Titan i and the XV-1s and the Air Tight are known for their dynamics. I am curious if anyone compared any of these or others and what their experiences where? The tonearm is critical in this so please give good details. Some of these cartridges in the wrong arm would sound slow or muddled.