You will have to find your own place. If everone did one thing the other would be more profitable. I do both. I let the market dictate which one I'm in heavier in at any one time. What works in one local will not be the best everywhere, their are to many varibles.
I think if you have a lot of money to invest initially, and plenty of land, then stockers will probably be your best turn around on your dollar. If you need to start slow, and build then cow/calf may be you best bet.