I own a Lagoon 440. Its not a slow boat. Average speed when I am cruising is 10knots. In a a 25 knot wind 12 knots is not a problem. Quickest I have had her was 15knots off St Peter Port in 30 knots of wind. She is desperate for new antifouling now which does slow her up !!
The raised helm position is fantastic. Its actually the best place to be when in rough seas.
