I don't think you would need that big of kicker for that boat. I have charter boats in the 24' range and they weigh in around 5400 lbs and I use yamaha 9.9 four stroke. They come with a power prop and they work fine. I will be starting to switch over to there 8 hp four stroke, which work just fine also. We fish in a lot more wind and weather than most folks, because we have to and they do just fine.
One other problem you would incounter with a bigger kicker, is the weight. I am sure yo uwill be using a drop down bracket for the kicker and the more the kicker weighs the more trouble you will have with them and the harder it will be on the transom.