I had to change providers this spring and shopped around. Progressive was the best I found @ $138/yr. (I also checked BoatUS and Gowrie)
Bit of an apples/oranges comparison - my TheMightyHobie18 & trailer is almost 25yrs old and only worth about $3000 now. I have 100k liability and a $500 deductible.
Tipping point for me was the included pet injury coverage. Actually - I just found it as I was leafing through the policy - how that got in there I'll never know.
Noticed my coastal navigation range is good for 75 miles though! When's the last time a non-spin boat ran the GT300?