I have used a selection of seariders for rescue type work over the last few years and strongly agree with the comments here about sea-keeping and given the kind of abuse they tend to get have always ben impressed with the durability.
I would think long and hard over the engine though - the boats i am talking about are a bit underpowered with a 50 hung on the bank - would rather see two of those personaly
, but then some people think about running costs before buying the outfit!
I seam to recall the upper limit is 130 odd HP, but better check that!