Castle 1410/Mamba Max for a budget setup, Tekin SC4x 5.5 or 4.5 turn motor and an RX8 if you're going balls-out.

The Novak Ballistic 550 motors are power hogs compared to the Tekin 550s, they're nowhere near as efficient.

RS Pro is not enough speed control for the SC4x motor, but that's fine because the RX8 is cheaper anyway[8D]