Bittrex is at least as solid as Binance, just with fewer options. KrakenGDAX as a backdoor to Coinbase. has improved in the last month and currently has no trading fees (and a USD account like @goldkey metioned). And then
Also, there is a new exchange set to come out (beta version in the next few weeks) in the next few months, called FairX, that will offer fiat->altcoins, and some people think it will have a huge affect on the Crypto space.
Great Info. I was looking for more info on various exchanges, too. The exchange that a person selects is as important as the coins that get selected. In some ways, maybe even more important.