I think the style and fashion of dive gear is under appreciated, imo. I would also disagree with going with all black gear unless that's what you like...why? Because underwater everyone looks very similar with all that black gear! My personal gear is black and blue...I even custom painted my fins for easy recognition so my clients can locate me in the water.
As for the best looking gear, I'm a bit biased, but it's hard to go wrong with Scubapro. They not only have the functionality and performance on point, but also offer great color choices where you can match all of your equipment.
If you are really into 'customs,' you should check out some of my stuff. I currently have several pairs of hand painted Jet Fins (1 pair currently for sale), as well as custom weight belts, log books, and dive apparel available the first of June. Glad to see another fashion-forward diver here! Of course it's not top priority, but why not look good at the same time?! Take care!
-Blaine