Pre amp for Plinius 100MK3

Any advice for a pre amp to match my Plinius 100MK3. I am considering the Audio Research LS25 and Jeff Rowland Sinergy 2. Thanks! P.S. I did not like the Plinius M16 pre.
I run this amp with a Joule Electra MK III preamp. It is a great combination. Larry Glasner
Try the CAT Ultimate. I run this with the Plinius MK III. You will get beautiful, transparent, present mids and a top end which is just about as clean and crisp as it gets with no brightness or harshness. Then listen to any high quality jazz piano recording.
I have the same question. Can you elaborate why M16 is not satifactory? Or any more suggestion out there?