Ask one question: do you want to be on the turboprop for the rest of your career? If the answer is no, then do as so many others do every day. Get the job that you want in stead of the command that you will only enjoy for a year.
So many good friends have left an almost guaranteed jet command at my low cost to join a long haul operator because their dream was to fly 'heavy metal'. No one told them not to turn down a command. Choose your path.