If you're looking to trade a medium amount of cryptocurrency and want a good general-purpose exchange, use CoinSpot or CoinJar (see my CoinSpot review and CoinJar review). CoinSpot and CoinJar are good exchanges with good fees if you use them properly. CoinJar in particular has fantastically-low fees now (it's possible to trade there basically for free) as they've brought their fees way down in the past year. CoinSpot and CoinJar don't quite have the trading volume of BTC Markets or Independent Reserve, so I am putting them in my "good general-purpose exchange" category. They will be cheaper for you than BTC Markets or Independent Reserve if you're not trading large volume, though, and will always be cheaper than Digital Surge or Swyftx if you use their exchange and not their instant buy/sell features (see my reviews of them, linked above, where I explain this).