I love my F9, and when my swing is on its easily the best driver I have ever used.
I switched the 2g weight for a 6g weight (now 20g total) and it weighs in at 207g. Even in stock form, the 203g it was wouldnt be considered light.
I now play it at 43.75", and it easily swingweights at D2. Maybe I got lucky with a sensible headweight from factory.