If was was looking for a 38' cruising boat at @ 8-9 knots cruise it would be a Calvin Beal 38', Duffy 37, Wesmac 38' or maybe a Flowers 38'. The Holland 38' are the prettiest but they all have engine boxes and how that will impact your salon for cruising. My guess is you could throw a continuous duty rated JD or Lugger in the 150 hp range in the others with no box and good fuel economy. Take look at this the length of the top and which hulls look good with long cruising style tops. A long top on the wrong hull will be almost impossible to resell...too many people try and take a 38' foot boat and squeeze the interior volume of a 42'. Then wonder why they get 40% resale value 4 years after they build them. Sounds like a great project...