Crazyhorse, what's your reason for pushing to such a low speed?
The 70-200 IS should be good for those who are working pros, amateurs but rich (or at least feel rich) or photojournalists who might shoot in low light with some zoom like 100-200mm. To be fair, the IS makes this a one hellava lens. But otherwise, I don't see how other lenses can't replace this IS version one for most jobs. USE A TRIPOD IF NECESSARY AND POSSIBLE!