Stejcraft - Offshore, Monaco or Islander (Feedback)


Im looking at purchasing a late model Stejcraft - Monaco 610, offshore 640 or Islander 580. The models im looking at are all now made in Australia not the previous chinese models. 


Wondering if anyone owns or has been in one can provide feedback on how they handle and expected fuel economy with a mid power 4 stroke or Opti. 115hp Opti on the 580 and a 150hp 4 stroke on the 610 and 640. 


Most of my fishing is within 20kms but would do the occasional 50km trip 

Anyfeedback would be appreciated