It's a mater of personal fit, you have to figure it out from other known rides or some other fitting technique. I'm not comfortable in a racing type posture, but I agree with shipwreck that sometimes even if you aren't comfortable you have to get low. Really heavy winds aren't easy on a rider either. So I would want a somewhat higher set, but the ability to get low. I no longer use a quil stem on my touring bike, but I am set up for a lot of adjust ment anyway. Touring is different. Most folks pick their time for recreational rides. Even if they think they go in all weather. But touring you really are out there in all weather.