It's your money and your car, so you should do as you like. That said, I'd be concerned that wrapping the roof in black would make the interior of the car even hotter than before. Only one way to find out for sure, though. I look forward to hearing how it goes.I've seen that and it looks good on that car.
But I'm not looking to color match the paint, I just want to keep the black oem roof look but without any light bleeding through.