Code wise, at this point it is not necessary given the distances to fixtures. However, recirc gives you the option of increasing your water heater temperature to 160 and installing ASSE 1017 tempering valves at the fixture locations. This will all but eliminate the possibility of legionnaires disease. This is something that plumbing boards have been wrestling with for years now. It is the right thing to do, but it get's a lot of opposition from building contractors due to the increased cost.