#1
i might get a fender strat so should i get the maple or rosewood fretboard?whats the difference in sound?
#2
Get what you feel comfortable with and like the sound of best, if you don't know, you shouldn't be considering getting one!

Rosewood = warmer
Maple = twangier, brighter

Of the two, I prefer maple, but it depends on which you personally like the best, quite obviously.
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#3
Play both, see what you like the most - I prefer maple - which I have on my MIA Tele, but the rosewood fretboard on my strat is lovely too.

I couldn't really find a HUGE difference from the fretboards soundwise when I was trying out Telecasters, but there is a fairly significant difference in feel IMO.
#5
i love the look and feel of a maple neck. you should try them both and see which one you prefer.