well i tend to do a mix, some on location, some studio, but on location is what i tend towards more, as my studio still can't compete with natural light =/. The 85 f1.8 was a lens i was looking at but i decided against it for now because a) I don't shoot so many portraits that i need a lens specifically for them, the 70-200 would also be used for a variety of other purposes, and b) most of the events i shoot that are not portraits and dimly lit are strange in that i either seem to need a lens that's about 30mm or one that's about 135, but nothing in between. Strange phenomenon really.