first tricopter

This is the list of parts that I am getting right now. Is this good or should I change some things? Also do I need a BEC? Hobbyking X900 Tricopter Glass Fiber Multi-Rotor Frame (USA warehouse) NTM Prop Drive Series 28-26A 1200kv / 286w (short shaft version) (US Warehouse) Turnigy Multistar 30...