I am repowering my 25' Seacat. Current power, 2-140 HP Suzuki 2-strokes. Considering 2 New Suzuki 140 4-strokes or 135 Optimax. Have read, heard, and observed mostly good things about both engines. Any one have experience or opinions with either engine. DFI vrs. 4-stroke??? Fuel ecomony? Power? reliability? longevity?