I won't be relying on it for heat, but the heat can help even out the temperature in our house. We have a couple of rooms that tend to get cold in the winter.

avalon nano is interesting but i wonder if it really heats up more than a small room.. 
im about to pick a bitaxe as well.. with the noctua fan

I can do both eventually, but I want to start with one. That probably means starting with one of the heaters (I'm leaning towards Avalon Nano, now) and getting a Bitaxe after winter.

Undisciplined

bitcoin_Mining

Bitaxe or Heatbit

can you maybe go for both?

The heater is amazing.. Does the work and let you stack.. But makes no sense after the winter months probably.. Depending where you live.. 

Bitaxe will go year round