For ETH & XMR, rx 470's are probably the consensus winner... they hash slightly slower than 480s but consume less power and cost less, so the ratios are the best, at least for most people/systems.  For ZEC, it's a bit more confusing since older cards seem to get more hashes on it (but probably also suck a lot of power). Check out the ZEC thread for better recommendations on that. As for 470's, I prefer the MSI 4GB Gaming.  Super quiet, easy to mod the bios, look great and run pretty cool. Many people in this forum love that GPU so check it out.