I completely agree with ghdprentice.
I've had several pieces of Prima Luna equipment since they entered the industry. Most recently as pair of EVO 400 amp which I used a s monoblocks. Vintage tubes certainly helped improve the sound quality, but it never reached the level of musicality which my CJ equipment provides. As you can see in my signature photo, I am using CJ LP27M monoblock amps, CJ GAT S1 preamp, and a TEA1 S3 phono stage. I have no intentions of changing any of those out.