Hi everyone,I am a newbie to CS...I have a 60D that is newly bought & I am still trying to get use to it.Recently a fren was asking mi why i din use a battery grip.So...as i forsee in the future(or any time soon)I might be getting one.Is there a particular brand i should be getting,like 3rd party brands...Or should I just stick to the Canon's battery grip.& what kind of price difference can I expect & what are the main difference between the original battery grip and the 3rd party ones? All the gurus pls enlighten...Thanks veri much!