Right, I know that increasing the weight will cause the ground roll to be longer. I'm trying to reduce the ground roll by getting the airplane up to speed quicker.

There was a problem with our plane being a little nose heavy, but also our elevator deflection wasn't nearly enough to be able to lift the nose. It wasn't an issue of not having enough speed to get enought lift out of the wing. Our stall speed is around 30 mph and we were traveling over 40 mph when we had to call it off before we ran out of runway. I'd like to get the speed up even more though, since we still have to add another 5 lbs, that's why I'm looking for the best take off propeller.

From what I've read, it looks like I need a larger diameter prop with as low a pitch as I can get. Our cruise and possibly landing performance might suffer, but we have flaps to help with that.