I don't know if you can determine this without asking him, but the first thing we did before buying anything was to audition one tube system and one SS system at a high end audio dealer. I knew what I liked going in, but we needed to find out what my wife's preferences were. Had I gone ahead and assembled a SS system, I would have had to sell it all and start over. Choosing between the two (or a hybrid amp) may not be an issue with your friend, but it is for many listeners.
Happy Birthday to your friend. That is a wonderful present!
Howard
Happy Birthday to your friend. That is a wonderful present!
Howard