No, don't get a cocker... get an Automag, they are cheaper and more reliable. But if you get one, make sure to invest in Nitrogen for the gun, as CO2 sucks with a mag... I had a bitchin' Micromag with a DYE aluminum barrel.. talk about deadly.
mags are good, but they are no match for a cocker. for accuracy and distance about the only thing that can compete is an angel and they are still a close second thats why most pros go with the cocker. once you start spending 300-500 dollars on a gun its all in taste