Nerdqaxe or Avalon Nano 3s?

So, I am finally looking for the second asic. My question is below. Is Avalon nano better than solosatoshi or tinychiphub nerdqaxes? Nano is definitely cheaper. But who knows for how long can it run. My solosatoshi is on the standard mode. Gives approximately 5th/s. If I over clock it, j/th are the same as avalon has. And I need to upgrade psu and add heat sinks to VR. And possibly replace asics heatsink for a copper version. Because fan is running 100% and temperature of the ASICS is above 63-64 celcius. If it hotter in the room, temperature definitely goes up. Tinychiphub is the most expensive one. But they claim that they used superior materials and new asics. And also 2oz of copper density per 1 square fit pcb. Solosatoshi used 1oz copper. Who can give a good advice to me?