I see lots of Echo trimmers on the trailers of professional grass cutting companies. No doubt, I'm sure it's good stuff and worthy of lasting quite a long time and taking a little abuse.
I've been down the Ryobi path - wasn't too good. I'm on a Snapper now, but that isn't faring much better than the Ryobi. When the tax refund gets back to me in a few weeks, I'll have to eye the Echo trimmer.