Yes, repower.
Replacing the Bukh with, probably, a Beta 10 or 13. The Nanni and Phasor is also in the running. I would like to hear from anyone who knows anything about these.The twin is very smooth and quiet.
VARUNA's Bukh DV8 was replaced with a Beta 10, Big improvement.
The Bukh is to exotic for me. That's fine for someone who drives and loves tinkering with his or her vintage Peugeot, MG or Triumph but I drive a Toyota. I want something that starts when I want, doesn't drip oil, is economical and can get parts reasonably priced.
Like the DV10 I understand they no longer make the one lung 10 hp Yanmar. Parts are and will be available, price aside, for some time to come though.