If you are really looking for a good two motor setup with one channel control- these are plentiful
just buy any outrunner and appropriate ESC , plus a y harness to plug into your motor channel.
The power you wan will befound using any 150/200 watt setup (per motor) - batteries are now available for little money ($15.00 Lipo in 30 c configuration)
You can easily duplicate the arrangement in larger sizes -up to 10,KW -very easily.