I've a Warmoth PRS clone with a Rosewood neck, and I've quite a few strat clones with different neck and fingerboard woods (from Wenge through to Anagre). I find that the neck contribution to the tone is actually less than people usually expect, unless it is a neck through guitar. The fingerboard wood affects the attack of the note, rather than an overall affect on the tone. I know that a lot of people might disagree with me on this, but to me the real difference with fingerboards is feel. I have quite a lot of guitars with Ebony fingerboards because I like the feel of them, but a change of pickups does much more for a guitars sound than the neck woods. The main difference with feel is that Rosewood doesn't need finishing (I have Goncalo Alves and Wenge which don't need a finish either). That does make a bit of difference when you are playing, but a lot of players like a light oil finish, which can still give the natural wood feel.
The real difference is sustain. Different woods make a big difference to the sustain of the note (though I have an all mahogany Les Paul that sustains for days!). Neck though also makes a difference there. But in order for all these to make an effect you need a solid bridge system. If you're puting in a Floyd Rose, then you won't notice anything!
