I have the Taz 6, and it is an upgrade from the mini, I swap extruders and love what it does for me. I have 4 and have two on my want list. Trading extruders is much like swapping filaments, and you can do very different things with different extruders.
My favorite is the MOARstruder, it is fast and can make some robust parts from conventional filament.
Ha! 
I’ve got everyone fooled. I do organizational projects to fight the riptide of entropy and my natural propensity to be a slob.