The sicce pumps are not cheap pumps, the sedra's are not all that, I mean I hear they are good pumps, but the sicce pumps have a few things going for them. It has little to nothing to do with GPH. The MSX pulls a lot of air,has a large volute, a bubble diffuser, the neck of yours does not tapper. These things negate whatever additional height yours has. As I said, I believe the MSX or the Octo Extreme will out perform it.