I just built one with a Grayson Hobby Dynam A22-15M Brushless motor,
http://www.graysonhobby.com/catalog/...products_id=56 and a Dynam 25 amp controller. I use a 3 bladed Master-airscrew 6x4 prop and 1650 11.1v 8C lipo pack from Common Sense RC. It has plenty of power to row. Be sure to add the recommended chine rails.
John