Seems a few of these Antminer E3 are showing up on eBay already. There are even many people bidding on them.
My GTX 1070 ti cards are STILL happy pushing 31 Mh at 106 watts.
I am now wishing I'd bought MORE of those....
SMOS-Linux -- 0/1400/112 can get 32.x Mhs
I suspect I could match that if I pushed my RAM and CPU harder, they're only at 1000 / 0 right now but I don't remember why I settled for those figures.
Perhaps not as stable at higher settings on one or more card at higher temps, or ZEC (which is what I did the heavy testing on back when) wasn't.