I'm about to purchase a new rig and looking at an 1870 alweld with a tunnel. My question is how do they preform I have friends would run jet drives bUT are struggling with speed. How are tunnel hulls with prop driven motors as far as speed, fuel economy,ect... I'm going to buy an 1870 with a 175 Yamaha sho. With either a prop and a console or a jet and a tiller. All help and opinions are appreciated.