I really dont want to start a DF/bent war here but. Someone mentioned a "pro bike fit". We hear that all the time from the DF boyz. The hard fact is while it may help some, it just cant make up for all the pain and discomfort that DF bikes cause. The many other advantages include view and safety.
Wittness the fact that a high percentage of Xcountry riders are switching to bents because of the long days in the saddle or on a comfortable seat in the case of a bent.