I have an outerlimits stock motor, 180a seaking esc, turn fins from my old sv27, and a cnc x440/3 blade prop and i'm running on 4s. I'm looking to get a bit more prop on it as after a full 5000mah lipo nothing is even warm inside the boat. I'm looking at an x442/3 and an m840/3. I'm leaning toward the m840/3 because it is detonged and with the boat being a stepped hull i figured it could use less of a lifting prop as it chine walks pretty good in 2-3 inch chop at wot. And yes ill get the check your cog and trim but theres only so much i can move the battery back and i like where the stinger is. what would you all recommend?

Well I decided to just order both, of course the m840/3 was on back order. Here's a video with the x442/3, after a 15 minute run the motor battery and esc weren't even warm.
https://m.youtube.com/watch?v=6F7oAO1pwPY

Nice