Try 5751 tubes in the 12AX7 positions. I've rolled such tubes in my VAC Standard LE and am very satisfied with the results. Tried many combinations and witnessed changes in the sonic signature, soundstaging and overall presentation.
Have a look at "Joes tube lore" in the internet. Even your friend could like the 12AX7 type of tubes by choosing the right ones for your VAC. And it is a less costly decision than selling to replace it by another unit.
The VAC Renaissance MK II is a fine machine, with a strong reputation, that deserves to be heard under different tube configurations before beeing replaced by something else.
Have a look at "Joes tube lore" in the internet. Even your friend could like the 12AX7 type of tubes by choosing the right ones for your VAC. And it is a less costly decision than selling to replace it by another unit.
The VAC Renaissance MK II is a fine machine, with a strong reputation, that deserves to be heard under different tube configurations before beeing replaced by something else.