I would prefer roasted maple. Reasons?
- it should has lower density than rosewood - lighter bass, less neck dive tendency
- roasted maple is less sensitive to humidity changes
- love the look of yellow/brown tinted baked wood, especially QS with some nice flaming
- all rosewood neck reminds me basses like Warwick, which does not belong to my favourite basses at all
I would also reconsider binding. I am in love with the look of binding, but strongly prefer non-binding necks in terms of feel. Wood fretboard edges (when is is nicely rounded, reliced, good fret edges job etc) feels so much more natural and fast for playing.
And as others say - pickup is component where you can save a lot. I would personally don't know how to specify winding on a pickup for the bass I have never heard. Better use stock pickup, hear the bass and then say what do you miss in the sound and let Mr Fralin or Nordstrand or whoever know what do you need.
All my humble personal opinions
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