Realistically, if you are serious about mining at all only the S/T9 or Avalon A7 miners would give you decent margins for profit. Most other miners nowadays aren't efficient enough for much at all and GPUs can often still be a better option assuming you buy at the right price even though the period of high profits has largely passed.
Thanks for the reply. It makes sense the S9 or T9 or Avalon A741 would be the only ones to yield a decent profit. I'm between going the GPU route and mining Ethereum but the profits are not as high and with the talk of Ethereum going the proof of stake route using a GPU miner for Ethereum will not be profitable.
So would it be wise to suck it up and go the bitcoin route with an S9 or Avalon A741? Or go with a GPU rig and do Ethereum and altcoin mining?
I know there's less places that accept Ethereum and alt coins in general as a form of payment and Bitcoin seems to be taking off especially recently. But that doesn't mean Ethereum or other altcoins won't take off.
I'd like to add with GPU mining since they use less power and have less noise I can place the unit at a space we rent with free electricity as the power bill won't go up THAT much. With Bitcoin mining they're too loud for that space and the power consumption would be too much for our landlord to not make us pay extra. I've asked and he says if its not going to be much more than say $100 extra a month for power then we can do it free.