I need some opinions from people who have used both or one of the two. This is for personal use only. I have about 5 miles of fence line that I clean a few times a year. Should i go with the 4-mix engine or stick with the 2 cycle fs 250? Is there a big difference in the vibration between the two? Loop handle or Bike? ( never used the bike handle before, always a j-handle) Any suggestions or opinions between the two would be greatly appreciated. I don't have much options other than Stihl unless I travel 50 miles or so. Pass the Stihl dealership every day.