I have several piano accordions. Each one was bought for its different sound, and technical capabilities (keyboard size, number of bass keys, number of registers/stops on both sides).

Depending on the mood in which I am, or the place where I will play, or sometimes the pieces needs an instrument with a particular range or set of contrasting sound colours, depends on which instrument I choose.

I have many whistles, in different keys, ranging from a high G or A (my memory is going!) and of different makes with differing playing properties - some are easier to play fast, some sound better when played slow, etc. Repeat previous para, substituting 'whistle' for 'piano accordion'.

I have several other instruments, which I (Repeat previous para, substituting 'whistle' for 'piano accordion'.)...