We recently purchased our first cruiser! 2005 Monterey 322 with twin Volvo Penta DPXi (320hp ea). I have looked every where and cannot find the best cruise RPM/Speed. The previous/original owner said it was 3500rpm/29.5kts. It seems high and it loves to drink the fuel!! Much more costly to run than my pervious Sea-Pro 206 DC with 200hp Yamaha. However, we LOVE it! What a great boat and layout!