Lamm L2 Reference tube recommendation

My mantra has always been "let our ears and wallets guide us". Having said that I just would not (even if I had that kind of coin) shell out that much money. To have heard the ML3 amps however is almost like having an out of body experience

I feel guilty, I never tried that in my L2R but I am interested in your results

I rolled some RCA 12AX3 in place of the stock Sylvania 12AX3. I thought I detected a slightly more natural presentation with less grain, but I could be fantasizing. The difference was not profound by any means. Nothing like what I experienced when I installed Mullard tubes in the LL2 Deluxe in place of the stock tubes.

The thing is there is swapping signal tubes and swapping power supply tubes. The LL2 is a tubed pre with a tubed signal path. The L1 and L2 are solid state with tubed power supplies. So in a well designed circuit, there is less of a difference with swapping tubes in the ps.
But in my case with the L1, the difference was easy to identify albeit small.

Nutella, would you discuss which tubes you prefer and why?

I am trying to eliminate as much grain as possible.

I realized after rereading Rodman9999's post that I installed an RCA 5651A rather than a 5651.