Cambridge Audio Evo 150 vs Hifi Rose RS520

I've narrowed down my search to get either the Cambridge Audio Evo 150 or Hifi Rose RS520 integrated amp/network streamer. I'd appreciate any thoughts on both. Evo 150 has more inputs/outputs and costs about $700 less, but the RS520 is 250w vs 150w for the Evo. I have Revel Concerta2 F36 loud speakers. They're not the super efficient or high sensitivity, so I'm thinking I might need the extra power of the RS520.