Don't go to kona! There are many better places. I just got back from there and it was a major disappointment. In march went to anilao Philippines. That was a blast. Tons of variety, great for a photographer. But mostly macro. Even if it is raining, it won't matter. The diving was great. Palau is fantastic as well.
In my opinion, On a scale of 1 to 10, the red sea is a 7 and kona would be a 3. With you traveling so far. Don't waste your time with kona. Go somewhere better! For wide angle, Fiji and Palau are the best I have been to. Better than the red sea IMO. Raja ampat, or Komodo I have heard are great for wide angle, but have not been myself.
If you are drawn to the kona manta dive, I have heard it is cool. But I did it 3 times last month and didn't see 1 manta. So it isn't a guarantee. The dives there are very similar, and really no coral to speak of. Plus it is the most expensive crap destination I have been to. A lot of money to not see much. Also the volcano wasn't flowing either. Trust me the diving isn't worth it.
Palau has so many different wide angle possibilities. Walls, sharks, wrecks, jellyfish lake, caves, holes....etc. Fiji has the best and most colorful soft coral in the world, with great viz.