Electricity is no problem in my case, since the racks are in the basement where I work.
I agree that Ethereum algorithm is good (and my current rigs are tuned for eth), but I'm thinking alternatively for the graphic cards since mining eth will stop in 19days...
That's why we have whattomine website to track which coin is the most profitable to mine, you can mine Flux, Ravencoin, Ergo, Conflux, Super sero, Ethereum Classic or the new Ethereum PoW.