The last two boats we have tried to make as quite as possible. Ironically, we ended up with the opposite in our prior boat. Never put downturn exhaust on a boat, it actually makes it louder. On our TXI we have the STE, the silent rider mufflers, and the insulated motor box. This makes the boat very quite. If I had to pick between the STE and the mufflers, I would pick the mufflers at least from ease of installing.