musica bella tube preamp

  I finally got my new musica bella lusso preamp a little over a week ago.  Right out of the box it has a very nice sound to it.  Compaired to my old ps audio solid state preamp the lusso has more weight to the music.  It is very dynamic and has that emotional connection to the music.  It really pulls the inner details from the recording and I know that people always say this, but I am hearing things in my recordings I didn't hear before.  All the extra detail and it is still very smooth and never harsh.  I have always read that tubes can run hot but this pre can be on for hours and still stays cool.   I would like to do some tube rolling and when I asked the manufacture about tubes to try he said that he thought I should let it run for another 100 hours or so before changing anything.  Do you think that I can do better with some nos tubes (JJ electronics are in the pre now).                                                                                                                                                                        
Based on another 6922 thread just dropped in some Matsushita / National 7DJ8's in my preamp and they sound fantastic. Got them from Upscale Audio $35 each for Platinum Grade. The thread I'm referencing is here:

Have fun and happy tube rolling!
  Thanks for the tip on Matsushita jond.   addyson815, as far as me having owned a tube preamp before the answer is no.  In that other thread I was asking about the sunfire pre.  I looked at a lot of preamps before going with the musica bella and so far I am happy with my choice.  
Get with Andy like I mentioned and he will recommend some tubes for you......and it won't cost you s small fortune.
Call Andy. Fastest and best way to deal with him. You won't be disappointed. He is the man!

Did you get the solid state or tube power supply?