Size of engine room is important but so is layout of ER and Lazerette or work area. There is a television show "Selling Yachts" and a couple was looking. The man was rather tall. Great work area forward of the engine room with table, drawers, all you'd dream of. Just the ceiling was 4" lower than his height. That to me is far worse than being a few inches short at the engines. He bought the boat. I'd sure like to know how that turned out. I've seen ER's that looked packed but no wasted space and everything was fully accessible. Things like the watermaker on a shelf over other items, a standard factory arrangement.