Across the nation in the Pacific (now in Hawai'i). You can disregard this as it doesn't meet your criteria but here is my input.
I've used ablative, semi-ablative, and hard. I sail a LOT so the ablative only lasted a few months. Semi-ablative lasted about 9 months, hard about 1.5 years. The deal with hard is you can scrub the bottom, something you will have to do after 3 to 4 months. Unfortunately I made a very bad choice on the last haul, using a paint without a biocide...a bad mistake. I've used Petite, Interlux, American (sp)Hupple and a few others. Basically they all suck and are probably only slightly better than house paint.