Wah you really power man
Classic range is a good start, I have one on rubber sole and I love it. Makes more sense because of our weather and also because I was intending to use it as a beater.
Quality aside, I think another key aspect is proper rotation. Having 2-3 pairs (mix leather/sneaker) will allow your shoes to 'rest' and prolong their lives.
When you say you have one pair of the meermins, on the classic collection with the rubber sole, may i know which exact model are you referring to?