The falling forward is a sign that your saddle isn't setback enough. Also notice if your wrists are bent on the brifters. You want them setup so that your wrists are in a neutral untwisted position.

The amount of correct setback varies quite a lot by individual rider. Some riders like a forward saddle even if its uncomfortable. I've collected data from 30 professional cyclist-setups of my own height and their setback varies from 60mm to 115mm. I'm comfortable in the mid-range there. Sprinters and shorter-races favor a forward saddle position, long tours favor increased setback for comfort at the expense of some power efficiency.