I had an electric one for years and aside from gradually developing a very leaky hose system, it worked fine. I replaced it with a name brand gas powered one last spring when I was preparing our old home for sale. It worked extremely well and was easy to start. Here at the new property...it refuses to start and I just haven't had time to fiddle with it. Honestly, for my own personal needs, an electric unit would be just fine. So my recommendation is to consider what the tool will actually be used for and decide accordingly.
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The most expensive tool is the one you buy "cheaply" and often...