I am using 1060 3GB Mini with single fan option.
The rigs are running cooler and better as compared to 480's
Better in which way? The hashrates must be a way lower.
zec hashrate beats the 480, and eth hashrate is still ~3/4 as much at a similar/lower price and better power usage.
you can find the mini 1060 cards for as little as $200usd/$260cad