Good question! Yes I saw the story of the Bitaxe finding a block. Very impressive!

For me the goal would be to actually participate in a pool to get some nice and fresh sats and be part of a good pool, for example ocean, as to participate a bit in the network as well. I was never a fan of lottery in any form anyway so I wouldn't like to have it just sitting wasting energy.

So overall I am leaning towards the Avalon even though it's closed source, since it has the highest hashrate and can act as a small heater.

Or maybe I should try and build a Bitaxe with 5-6 chips in there? That would be awesome..!