So you are serious about cryptocurrency mining? You may want to give the TITAN PLUS a look. It is a powerful system developed for Ethereum & Monero mining. It has a 4U rackmountable chassis, dual Intel Xeon E5-2620v4 2.1 GHz processor, 10x overclocked AMD RX 580 GPUs, and 4 x 2000W redundant power supply.
The cloud miner has 16GB RAM and 150GB SSD inside. It has an Ethereum hashrate of 270 mH/s. More info is available here.