Of course, color is all about personal opinion.
1. Deep Impact Blue is nice in the right light...BUT to me it looks purple on overcast days. That's a no go for me.
2. White looks great.
3. Black is beautiful, if you don't have dents, swirls, or dust on it. Long term...I'd stay away.
I thought I wanted a DIB, but didn't like it when I saw it in person. With black I feel like you have to either not care about seeing swirls in your paint or your gonna be stressed out about it all the damn time.
White and I own a black 16 GTPP car. While it looks amazing clean, one rain storm and it looks awful. If I could go back, it would be a white GTPP in the driveway instead of the black one. The White with black wheels is a great looking car
If you can keep up with the upkeep of owning a black car, I'd go with that. Black GT is what I have and I wax and wash it regularly. White was a close runner up for me.