If you have light amounts of weed eating...get a stihl fs70 or fs 90....or an echo srm 266. If you have lots of trimming, or like me, you help out family members from time to time and their stuff is WAY out of control....get a stihl fs 110 or fs 130....echos largest srm 280 is only 28 cc's, so my money is on larger stihls there. I sell both every day at work and help tons of people get the right tool for the job. As others have said buy trufuel or sef 94 brands of premix.....expensive....yes....problems and headaches.....no. Go visit a reputable dealer in your area.