I settled on the Art Audio Jota. It adds authority, especially in the low end, and gives the notes a fullness that wasn't quite there. The change was less dramatic than when I replaced my old Rogue 66 with the Lamm but it adds more of everything: detail, stable imaging and authority.
What amp to use with a Lamm LL2
My system starts with a Sony ca70es cd player into a Musical Fidelity a3/24 DAC into a Lamm LL2 pre into a Rogue 88 power through Joseph ra25si speakers. Anyone have experience with the Lamm? What power amp works well with it. I'm assuming that the Rogue is the weakest link now in the system.