As a christmas present to myself i'm going to build an LA-2A from scratch. I could buy the real deal, but I won't - I love a good DIY project and any reason I can find to get busy with a soldering iron is good enough for me.
I'm still in the process of ordering/gathering parts, but don't intend to cut corners or penny pinch. With this in mind, if you have a working history with LA-2A's i'd like to know what your preferences are in regards to tube selection. NOS RCA is always a favourite (and I have a bunch of 12AX7's ready to go), but truth be told I prefer JJ's in my vintage Fender amp clones.... but guitar amps and studio gear are two different things.
If you've had a bit of tube experimentation with an LA-2A, please fill me in with your discoveries.
The first 12ax7 in the signal chain is really important and makes a difference in sound and background noise. My favorites, since being in Europe, are old Philips, Valvo or Telefunken tubes. They are all a little bit different, I take those with the least noise and distortion, which can be any of those brands, depending on the individual tube.