I have worked on five or six of the Burley bents, good bikes, with a solid feel. At $899 get the Koosah, don't get hung up on the componentry. When it wears out replace it with something better.
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Bentbaggerlen
"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." - Arthur Conan Doyle