Black Widow. I've had it on my J-80 in San Diego for a year now and it has performed great. You still need to wipe it down, but it's so slick, any growth slides right off. I applied it with a standard Wagner airless spray gun with only minimal thinning. I did not do a full burnish, but knocked of any dust nibs after it had dried for a day with 800 grit on a sanding block. It's VERY smooth)
Prior to Black Widow, I was using Petit Vivid. It was decent paint and good when the boat was in and out of the water a lot, but I agree that Black Widow is at least 33% better when it comes to the need to clean and it has lasted longer. The only problem is, it's black so you can't see kelp as well.
I used E-paint for two seasons in Hawaii before I gave up on it. It never lasted at the waterline longer than a few months. Be careful when sanding it! The peroxide content makes it just like tear gas and just a little dust in the eyes or nose will cause an immediate reaction.