I'd like to get opinions on trimmers. I'm looking at Echo, split shaft, straight shaft trimmers, with the idea of using different heads on it in the future, i.e., hedge trimmer, pruner, brush etc depending on what I need to do. I had a Stihl in the past and it was a fairly good machine as well... although I think I could have used a bigger unit. Anyway, does it simply come down to which one has the better dealer/service center?..... or is there a fundamental design issue that I should be aware of. Thanks!