Hi guys, I'm currently looking at a four stroke outboard to power my 12 foot aluminum boat. I've narrowed it down to these three models. What are the differences betwen the the BF8 and the BF9.9? They look identical and have the same displacement. The BF5 looks to be of the older Honda design, whereas the BF8 and BF9.9 look more "rounded"; are the BF8 and BF9.9 as tough as the older design BF5? Any opinions on these outboards would be greatly appreciated. Also, does anyone know the approximate top speed of these three models? Thanks gents.