With a difference of $100 I think your observation of the lockout is good.
I like a rigid fork myself, but they are hard to find, and I think a lockout is a good compromise.
Without looking at the specific bikes for specifications (I am feeling lazy at the moment) my only suggestion would be to go toward the LBS if you are not the type to do your own maintenance since the LBS would be likely to provide a free tune-up, and obviously the initial assembly and adjustment as part of the price. Also for any warrantee issues, the wrenching would probably be done by the shop instead of by you.
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Slow Ride Cyclists of NEPA
People do not seem to realize that their opinion of the world is also a confession of character.
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