I'd check out the new G2 E-TEC, anything from a 200 HO to a 300 would work and will beat any 4-stroke on BOTH on both mid-range torque AND fuel burn! Check out these
performance bulletins. Not cheap but the digital throttle & shift, integral power steering, and auto trim are pretty slick.
On the 4-strokes, I think Suzuki has done their homework better than all the others with a chain drive on the camshafts instead of belts, and offset driveshaft/greater gear reduction, allowing them to run a a bigger, slower turning, more efficient prop. Plus it sounds like Suzuki is trying to buy market share with the prices some of the dealers are quoting!