i am looking at a 2005 285 magnum w/ a 175 evinrude on it, i heard that the magnum hulls were just the old javelin hulls? is that true? has anyone ever rode in a 285, and whats the top speed i can expect it has a jackplate,hotfoot,lams480,x125, motorguide digital 82lb, tandem axel trailer w/ brakes.