If you have some 3S or 4S Lipo batteries laying around you might want to check out the Volantex Vector 80 Remote Control Boat ($199). It comes with everything you need, sans batteries, and is fast, very fast. For the money this is a lot of boat. The boat is shipped “ready to run” and is powered by a water cooled 1800KV brushless motor. Even the ESC is water cooled. The Recent Vector 80 RC Boat is 81cm long and 21cm wide.