These are nice things to have. A lot of people spend huge sums of money collecting watches etc. I think there is nothing wrong in having nice accordions.
The Beltuna Spirit V will be all the accordion most people could ever want. It's musette and double octave rolled into one.
If you are working on learning quint free bass, either keep the Titano or get a nice Victoria Poeta maybe...
Send the rest over to me, I will look after them for you