[Bushwacker]

For rough water running, min planning speed is a big deal, and the guys running 23's with twin TWO STROKES seem to have to run over 20 mph to plane. That situation would be worse for heavier 4 strokes. If you're determined to have twin 4 strokes, I'd pick the lighter 140 and save at least 100 lbs. I think that 175 (and the 150 Yammi and Honda) is about a 500 lb motor when you consider wet weight and include cowling. The DFI 2 strokes are lighter, have more mid-range torque, are competitive on fuel consumption, and the E-Tec is as quiet or quieter than the 4 strokes at cruise, so you may want to consider them also. I have a big comparison spreadsheet I put together on the 150-175 hp motors a couple of years ago when I was trying to make same decision. It includes some test data from PowerBoat reports of 6 motors on identical boats. If you'll PM me your e-mail address, I'll be glad to send it to you.