If you like Glocks,Buy one of each,then decide.

I'm not a big fan of the .40,
no reason really,just have my hands filled with the other calibers.
These are really tuff questions,which one,good luck. My solution,I bought
a G17-19-26-20-29-30-36 ,the question is what will I buy next..21 SF,?
Help me....!