I have a 20ft Hewescraft Searunner. It is powered with a 100 HP yamaha 4 stroke, and an 8hp yamaha 4 stroke kicker. It is a very stable boat. I have been out in some pretty nasty stuff, and never felt in danger. The downside to aluminum is the noise when running. It bangs a little bit. As long as you stay on top of the rinsing and keeping good zinc on it, you'll never have any problems. I did a lot of research before i bought mine and decided this was the best way for me to go. Hope this helps.