Jim,
I have used Petit Vivid with success for 1-3/4 years with my R27 used in both salt water and fresh water lakes and with lots of trailering. However, it is really thin now in many places, so I'm planning to have it repainted in the next 1-2 months.
In November, I got quotes from both Olsen Marine Services and Gulf Marine Ways & Supply on Main Street in Ft. Myers Beach; these two are side-by-side businesses. They both recommended Interlux Micron Extra for the salt water in southwest Florida and for trailering to/from fresh water. I know another Ranger Tugs boater, who was at the SW Florida Rendezvous, had his boat painted with Micron Extra at Gulf Marine in November. Also, Captain Dan of "Star of Orion", who takes passengers for cruises on his sailboat out of Salty Sam's Marina, had his sailboat done at Gulf Marine with Micron Extra in November. Both seem to be pleased with it.
I'm planning to use Micron Extra for my next bottom paint.