You have done the homework and are prepared to spend the money, so the chances are you should get a good outcome. I went to the other extreme: started with a second-hand (ex contractor) Italian straight-shaft brushcutter for $70, got annoyed with it being too hard to start and didn't want to pay for a line-trimming head for it so I gave it away, then bought a bent shaft line trimmer for $20 and haven't yet reconciled myself to fairly hard starting and (compared with the Italian brushcutter)crummy running. Both were in pretty good condition, but because of design features were best suited to somebody poor but tolerant. I gather you aren't either of those things, and are choosing accordingly.
