I own a number of four strokes - a Saito .72, a Thunder Tiger F91-S, a Magnum RFS .52, and a Magnum RFS .70 and they're all really nice engines.

I have to admit to admiring the simplicity and reliability that my 2-strokes offer - 1 O.S. .46 FX, 2 O.S. .46 FXi, 1 Magnum XLS .52A, 1 GMS .47

As nice as the four strokes are, I doubt I'll ever get away from 2-strokes completely. They're cheap, they're easy, and they just work!