I think black with white accents will look the best.
Also are you planning to paint the inside of your case? You could paint it dark blue, red or black and I think they'll look seriously awesome. If you swapped out the green LEDs and replaced them with blue I think it would look slightly better. The green LEDs aren't every intense, also when they reflect off the silver it looks kinda dead.
So I would say either replace the green LEDs or paint the inside of your case a dark colour.
But yeh if you only want to paint the outside when white streaks will look sick