Easy... Ablative for saltwater (let the salty folks answer with the best product for you)... but only if it's to be in the water for more than a day at at time (long weekends same)
VC17m for freshwater, again if it's going to be in for more than a day or 2 at a time.
But just wax the gelcoat and sail if you are always gonna trailer/day sail.
The Capri 25, cheap, fast, trailerable, and paid for...
"We're going the wrong way!"
"Yeah but look how fast we're going!"