Wow! 5-6 pairs is something new for me
At the moment i have only KZ ZS6 and pair of Sennheisers - eH150 and HD449 (i like to have iem and big ones, you know, to use them depending on the mood) but actually after buying KZ i use only zs6. They are almost perfect for me
Especially cuz i have not much money for now
Cheap foam ear cups + zs6 + smsl ivy = i like the sound of my Chineese android
So, i guess, zs6 is very good headphones and very universal ones
P.S. Sorry, maybe my english is not good enough